please answer the question below

Find the second-order partial derivative. 4} Find f3: when fixgr] = 3x33 - 15:2 + 23;. A124)? 3} -14 C} .23 D] 43:}; Find the relative extrema of the function, it they exist. Use the First Derivative Test to state if the]r are min: or min, and state the 1 value where they exist. 5} x}: :3 ~12\" 3