Exercise #3: Strings, operations Write a C++ program that prompts the user to enter a sentence, the program then does the following 1. Prints the total characters in the sentence. 2. Prints the word count of the sentence, assuming only one space between each tow words. 3. Prints total vowel fa, e, i, o, u in the sentence. 4. Prints the vowel frequency as shown in the sample below. 5. Prints the sentence in reversc 6. Prints the total number of characters other than the alphabets (Note: space is a character) 7. Prints the sentence in a way so that the case of each character is changed, i.e. from lower to upper ane vice versa