Consider the function f(x) = (ax + b) eax+b, with a, a > 0. answer the following in terms of a, b, a, and b: (i) what are the critical numbers of f? critical numbers: x = (ii) where is f increasing? f is increasing on (intervals) (iii) where is f decreasing? f is decreasing on (intervals) (iv) at which x does f achieve its local maxima? f achieves local maxima at x = (v) at which x does f achieve its local minima? f achieves local minima at x = (vi) where is f concave up? f is concave up on (intervals) (vii) where is f concave down? f is concave down on