Let j(x) = x°(20 + 3x) + 22. Use this function to answer the four parts below. %3D (part a) Find the critical points of j. Enter a comma-separated list of exact num O A. the critical points of j are given by x = OB. jhas no critical points. (part b) Find where relative minima of j occur (if any). O A. relative minima of j occur at x = Enter a comma-separated list of exact numbers. N OB. jhas no relative minimum. (part c) Find where relative maxima of j occur (if any). O A. relative maxima of j occur at x = Enter a comma-separated list of exact numbers. No O B. j has no relative maximum. (part d) Find the absolute extrema of j on the interval 5and the x-values at which they oc 3. The absolute maximum of j on the interval is which occurs at x = The absolute minimum of j on the interval is . Enter a comma-separa which occurs at x = . Enter a comma-separate