Someone please help me with C programing Assignment

Changing the Line cases: Ask the user to type in a sentence and change the case (upper or lower) of each letter in the sentence. Enter a string: The cat in the Hat. Here is the string with cases swapped: The cat in the Hat Concatenating strings Ask user to type her/his full name and use start to combine the name into a single string. Print the resulting concatenated string Enter your first name: Richard Enter your middle name(or initial): Dean Enter your last name: Anderson Here it is your concentrated name: RichardDearAnderson Extracredit Concaternating strings II: Ask user to type her/his full name and use to combine the name into the string with spaces and in the following format: lastname, firstname middleintial The format includes an comma behind last name followed by a space and the initial of the middle name with a period. Print out the concatenated string. Enter your first name: Richard Enter your middle name(or initial): Dean Enter your last name: Anderson Here it is your concentrated name: Anderson, Hichard D