IN C++ PLEASE THANK YOU!!!!!!

(5) Write a nested loop that displays 10 rows of # characters. There should be 15 # characters in each row. Your output should look like: ############### ############### ############### ############### ############### ############### ############### ############### ############### ############### (6)Convert the given for loop in the starter code to a while loop. The output should look like: 1 squared equals 1 2 squared equals 4 3 squared equals 9 4 squared equals 16 5 squared equals 25 6 squared equals 36 7 squared equals 49 8 squared equals 64 9 squared equals 81 10 squared equals 100 (7) This program started in Programming Challenge 15 of Chapter 3, and was modified in Programming Challenge 9 of Chapter 4. Modify the program again so it displays a menu allowing the user to select an addition, subtraction, multiplication, or division problem. The final selection on the menu should let the user quit the program. After the user has finished the math problem, the program should display the menu again. This process repeated until the user chooses to quit the program. Input Validation: If the user selects an item not on the menu, display an error message and display the menu again