C++ is the language

Question 11 20 points Write a program that reads a lower-case letter inLetter, and prints a shape of an isosceles triangle. The first line of the triangle should have the letter a, the secon, ane of the triangle should have the letter b, the third line of the triangle should have the letter c, , the last line of the triangle should have the letter in Letter In addition, the casing of the letters should alternate between lines. That is, in the first line, the 'a' should be lower case. In the second line, all 'b's should be upper case. In the third line, all the 'c's should be lower case, etc. Your program should interact with the user exactly as it shows in the following two executions Execution example 1: Please enter a Tower-case letter: BBB CCCCC DDDDDDD Execution example 2 Please enter a tower-case letter