Fix footer: update to 2023 XYZ, Inc.

Author: Shahana-salam

README.md

@@ -1,7 +1,21 @@
+  GNU nano 6.2            README.md                      
 # Introduction to Git and GitHub
 
 ## Simple Interest Calculator
 
+A calculator that calculates simple interest given princ>
+
+```
+Input:
+   p, principal amount
+   t, time period in years
+   r, annual rate of interest
+                   [ Wrote 16 lines ]
+^G Help       ^O Write Out  ^W Where Is   ^K Cut
+^X Exit       ^R Read File  ^\ Replace    ^U Paste# Introduction to Git and GitHub
+
+## Simple Interest Calculator
+
 A calculator that calculates simple interest given principal, annual rate of interest and time period in years.
 
 ```