(a) Consider the function f(x) = (4x + 1)(7x + 5). Enter the number of critical pointsumbers of f(x). EX Enter a number. Determine the x-coordinates of the critical points. Enter your answer as a comma-separated list of values. The order of the values does not matter. Enter DNE if A(x) does not have any critical points. X (b) Consider the function g(x) = 4X + 1 7x + 5' Enter the number of critical pointsumbers of g(x). Determine the x-coordinates of the critical points. Enter your answer as a comma-separated list of values. The order of the values does not matter. Enter DNE if g(x) does not have any critical points