Create a function f (x) satisfying the following criteria. Using the chart below, the values for a and c correspond to the first letter of your first name. The values for b and d correspond to the first letter of your last name. ABCDE: 2 FGHIJ: 3 KLMNO: 4 PQRST: 5 UVWXYZ: 6 Your values for a, b, c, and d should be inserted into the following function. f (ac) = (a - bacc )dFor your main post, state your function f(a ) and find its critical numbers, making sure to state why, per the definition of a critical number, each value you find is a critical number. Use a calculator to find the critical numbers rounded to three digits. Clearly label, with appropriate mathematical notation, your function and your critical numbers, as your classmates will be using these in their responses to your main post