4x+9 6x+3I (1 point) Consider the function f(x) = For this function there are two important intervals: (oo,A) and (A, 00) where the function is not defined at A. Find A: 555 (1 point) Suppose that you are given the derivative of a function f'OC) = (x + 5)(7 - xxx - 12) Then the first relative extremum (from the left) for f(x) occurs at x = SE The function f(x) has a relativ at this point. The second relative extremu ft) for f(x) occurs at x = E55 ( The function f(x) has a relative ? v at this point. The third relative extremum (from the left) for f(x) occurs at x = The function f(x) has a relative ? v at this point. Find the second derivative f \" (x). The first inflection point (from the left) for f(x) occurs at x = 555 The second inflection point (from the left) for f(x) occurs at x =