May you please help me find the maximum and minimum that occurs at X? And what X is? Thank you in advance

Find the absolute extrema if they exist, as well as all values of x where they occur, for the function f(x) = 3 2 1 2 + 6x - 5 on the domain [ - 7,0]. Find the derivative of f(x) = -x3+ -x2 +6x -5. 2 f' (x) =