(Solved): give me proper full code and how to execute it  Adding the quotation marks without anything in ...

Adding the quotation marks without anything in them to yo number forces it to be a String. Assignment Portion - hand in once completed 4.20 (Pnocess \( a \) string) Write a program that prompts the user to cnter a string and displays its length and its last character. "4.15 (Phome key pods) The international standard letter/number mapping found on the telephone is shown below: Write a program that prompts the uwer to enter a lowercase or uppercase letser and displays its comesponding number. For a nonletter input, display invalid input.