A graphing calculator is recommended. A function is given. f(x)=9+x+x2 x3 - (a) Find the local maximum and minimum values of the function and the value of x at which each occurs. State each answer rounded to two decimal places. local maximum (x, y) = local minimum (x, y) = ( (b) Find the intervals on which the function is increasing and on which the function is decreasing. State each answer rounded to two decimal places. (Enter your ans increasing decreasing