I finished it!

TestAssessment/TestViewController.m

@@ -19,39 +19,43 @@ @implementation TestViewController
     This method should return any negative NSInteger
     (hint: cannot be 0)
  */
-- (void)shouldReturnANegativeNSInteger {
-
+- (NSInteger)shouldReturnANegativeNSInteger {
+    return -4;
 }
 
 /*
     This method should return any positive CGFloat
     (hint: cannot be 0)
  */
-- (void)shouldReturnAPositiveCGFloat {
-
+- (CGFloat)shouldReturnAPositiveCGFloat {
+    return 5.66;
 }
 
 /*
     This method should return a truthy boolean
     Truthy: Something which evaluates to TRUE.
  */
-- (void)shouldReturnAPositiveBool {
-
+- (BOOL)shouldReturnAPositiveBool {
+    return TRUE;
 }
 
 /*
     This method should return any single char from c - l
  */
-- (void)shouldReturnACharCtoL {
-
+- (char)shouldReturnACharCtoL {
+    return 'd';
 }
 
 /*
-    This method should return the product of all numbers from
+    This method should return sum of all numbers from
     0 - 1000 using a loop (eg. 1 + 2 + 3 + ... + 998 + 999)
  */
 - (NSInteger)shouldReturnSumOf0To1000 {
-    return 0;
+    int sum = 0;
+    for (int i = 0; i < 1000; i++){
+        sum = sum + i;
+    }
+    return sum;
 }
 
 /*
@@ -60,7 +64,13 @@ Given a c array (int[]) and a count, return the average of the numbers within th
  */
 - (NSInteger)shouldReturnAverageOfArrayValues :(int *)arr
                                  withSize:(int)count {
-    return 0;
+    int sum = 0;
+    for (int i = 0; i < count; i++){
+        sum = sum + arr[i];
+    }
+    int average = sum / count;
+
+    return average;
 }
 
 /*
@@ -70,7 +80,18 @@ Provided a C string (array of chars), return the character
     (hint: assume there will be a char after g)
  */
 - (char)shouldReturnCharAfterG:(char *)str {
-    return '\0';
+    NSInteger length = strlen(str);
+    char CharAfterG;
+    int i = 0;
+    while (i < length) {
+        if (str[i] == 'g') {
+            CharAfterG = str[i+1];
+            break;
+        }
+        i++;
+    }
+
+    return CharAfterG;
 }
 
 /*
@@ -79,52 +100,66 @@ - (char)shouldReturnCharAfterG:(char *)str {
  */
 - (NSInteger)productOfAnInteger:(NSInteger)aNumber
               andAnotherInteger:(NSInteger)bNumber {
-    return 0.0;
+    return aNumber * bNumber;
 }
 
 
 /*
     This method should return a YES if aNumber is Even
  */
 - (BOOL)isEven:(NSInteger)aNumber {
-    return NO;
+    if (aNumber % 2 == 0)
+        return YES;
+    else
+
+
+        return NO;
 }
 
 /*
     This method should return YES if aNumber is a multiple of 10
  */
 - (BOOL)isMultipleOfTen:(NSInteger)aNumber {
-    return NO;
+    if (aNumber % 10 == 0)
+        return YES;
+    else
+        return NO;
 }
 
 /*
     This method should return YES is aNumber is odd and bNumber is even
  */
 - (BOOL)returnYesIfThisNumberIsOdd:(NSInteger)aNumber
                andThisNumberIsEven:(NSInteger)bNumber {
-    return NO;
+    if ((aNumber % 2 == 1) && (bNumber % 2 == 0) )
+        return YES;
+    else
+        return NO;
 }
 
 /*
     This method should return the model of the Car
     (hint: command + click on the class name to see what methods are available)
  */
 - (NSString *)shouldReturnCarModel:(Car *)car {
-    return @"";
+    return [car model];
 }
 
 /*
     This method should change the model of the car to "Firebird"
  */
 - (void)changeCarModelToFirebird:(Car *)car {
+    return [car setModel:@"Firebird"];
 }
 
 /*
     This method should ask the car to drive 4 miles and then return
     the car's current fuel level
  */
 - (CGFloat)tellCarToDrive4MilesAndReturnFuelLevel:(Car *)car {
-    return 0.0;
+    [car drive:4];
+
+    return [car fuelLevel];
 }
 
 /*
@@ -135,11 +170,24 @@ - (CGFloat)tellCarToDrive4MilesAndReturnFuelLevel:(Car *)car {
     4) Return the car
  */
 - (Car *)createAndReturnANewCar {
-    return [[Car alloc] init];
+    Car *newCar = [[Car alloc] init];
+    [newCar setModel:@"Honda Pilot"];
+    [newCar drive:6];
+
+
+
+    return newCar;
 }
 
 - (int)returnSumOfAllItemsGreaterThan100:(int *)arr withSize:(int)size {
-    return 0;
+        int sumOfItemsGreaterThan100 = 0;
+
+            for (int i = 0; i < size; i++) {
+                if (arr[i] > 100)
+                    sumOfItemsGreaterThan100 += arr[i];
+            }
+
+    return sumOfItemsGreaterThan100;
 }
 
 @end