Add 4 questions to fourth mini-quiz

Author: elPiablo

pages/lessons/projects/4.mdx

@@ -457,7 +457,7 @@ additional comment line I added that says
 })
 ```
 
-Our new `describe` section show below will replace that line that says
+Our new `describe` section shown below will replace that line that says
 `// this is where existing describe section ends`.
 
 <Callout emoji="💡" size="md" variant="info">
@@ -527,7 +527,7 @@ the proper amount of Eth is not provided. This happens here:
 ```javascript
 await expect(
   contract.mint({
-    value: hre.ethers.utils.parseEther('0.001'),
+    value: hre.ethers.parseEther('0.001'),
   }),
 ).to.be.revertedWith('Not enough value for the minimum Tier')
 ```

utils/questions/lesson-4/4-mint-withdraw/Q1.json

@@ -1,22 +1,12 @@
 {
-  "question": "",
+  "question": "Syntax errors: is your final '})' syntax matching the opening 'describe('TierNFT', function () {' every time you add new tests?",
   "options": [
     {
-      "answer": "",
+      "answer": "Yes",
       "correct": true
     },
     {
-      "answer": ""
-    },
-    {
-      "answer": "",
-      "correct": true
-    },
-    {
-      "answer": ""
-    },
-    {
-      "answer": ""
+      "answer": "No? It's easy to run into errors with the smallest things. We all do it. Take your time to read the error messages."
     }
   ]
 }

utils/questions/lesson-4/4-mint-withdraw/Q2.json

@@ -1,22 +1,18 @@
 {
-  "question": "",
+  "question": "In the contract, we often use the 'require' statement to enforce certain conditions. In our tests, which Chai function helps us verify if the contract indeed throws an error when a condition is not met?",
   "options": [
     {
-      "answer": "",
-      "correct": true
+      "answer": "expectError"
     },
     {
-      "answer": ""
+      "answer": "expectThrow"
     },
     {
-      "answer": "",
-      "correct": true
+      "answer": "expectFailure"
     },
     {
-      "answer": ""
-    },
-    {
-      "answer": ""
+      "answer": "revertedWith",
+      "correct": true
     }
   ]
 }

utils/questions/lesson-4/4-mint-withdraw/Q3.json

@@ -1,22 +1,18 @@
 {
-  "question": "",
+  "question": "When using 'expect()' with the 'to.equal()' function, what does the argument passed to 'to.equal()' refer to?",
   "options": [
     {
-      "answer": "",
-      "correct": true
+      "answer": "The expected output of the test case."
     },
     {
-      "answer": ""
+      "answer": "The contract function being tested."
     },
     {
-      "answer": "",
-      "correct": true
+      "answer": "The result obtained from an asynchronous operation."
     },
     {
-      "answer": ""
-    },
-    {
-      "answer": ""
+      "answer": "The value returned by an assertion or condition.",
+      "correct": true
     }
   ]
 }

utils/questions/lesson-4/4-mint-withdraw/Q4.json

@@ -1,22 +1,18 @@
 {
-  "question": "",
+  "question": "In the 'withdraw()' tests, why is the line 'await contract.connect(otherUser).withdraw()' used?",
   "options": [
     {
-      "answer": "",
-      "correct": true
-    },
-    {
-      "answer": ""
+      "answer": "To ensure the contract owner can withdraw the entire contract balance."
     },
     {
-      "answer": "",
+      "answer": "To verify that the 'withdraw()' function updates the contract balance correctly.",
       "correct": true
     },
     {
-      "answer": ""
+      "answer": "To check if the contract is functioning correctly for non-owner users."
     },
     {
-      "answer": ""
+      "answer": "To confirm the contract has sufficient funds before withdrawing."
     }
   ]
 }