Solgift /-150. Problem 12 Previous Problem Problem List Next Problem (1 point) Consider the function f(a ) = 5(a - 4) 2/3. For this function there are two important intervals: (-co, A) and (A, co ) where A is a critical point. Find A 4 Library For each of the following intervals, tell whether f(x) is increasing (type in INC) or decreasing (type in DEC). (-00, A): INC (A, 0.): INC For each of the following intervals, tell whether f(a) is concave up (type in CU) or concave down (type in CD). (-00, A): CU ( A, co ): CD Note: You can earn partial credit on this