Need help on C++ Homework

Thanks.

LaB aSSIGNMeNT Task 1 create a Menu: enter 1: convert Uppercase to Lowercase enter 2: convert Lowercase to Uppercase enter 3: Is Input in english alphabet enter 4: exit Program will begin with a menu above. User will input a char A-Z or a-z. The program will output the uppercase or lowercase conversion for the char that was input, or determine if input is a letter in the english alphabet. If the input is a number or special symbol the program will output invalid symbol and display the menu. The program will run until the user decides to exit the program. attach a snipping photo of source code and output