Consider the function f(c) = 7(x - 5)^(2/3). For this function there are two important intervals:(- ?, A) and (A, ?) where A is a critical number.A is _______________For each of the following intervals, tell whether f(x) is increasing or decreasing.(- ?, A): ____________(A, ?): _____________For each of the following intervals, tell whether f(x) is concave up or concave down.(-?, A): ____________(A, ?):_____________