3. In this question, you will write a program that manipulates a text variable entered by the user. (a) Write a program that requests a text string from the user (b) Complete your program so that it counts the number of words contained in the text string and displays the result. HINT 1: Notice that counting the number of words comes back to counting the number of blank spaces. You will need to find the relation between the number of words and the number of spaces. HINT 2: You can use the function length) to determine the number of characters in the input string. Then you can use a while or for loop to determine the number of blank space in the string. (c) Check if the word "pizza" exists in the text string. You can display the string The word pizza is in the string." or "The word pizza is not in the string." HINT 3: strfindO I need the MATLAB code for all parts please