For y = f(x) =2x - 7, x =5, and Ax = 4 find a) Ay for the given x and Ax values, b) dy = f '(x) dx, c) dy for the given x and Ax values a) Ay = (Round to four decimal places as needed.) b) dy = f' (x)dx = () ox c) dy = (Round to two decimal places as needed.)