please answer the ques

Let ((x) = Inx - 5x , for x > 0. 4. Solve /(x) = f(x). [2 marks] A function f is given by f(x) = (2x + 2) (5 - 12). 5a. Expand the expression for f(x). [1 mark] 5b. Find f'(x). [3 marks] A function f has its derivative given by f'(x) = 3x2 - 2kx - 9, where k is a constant. 6a. Find f" (x). (2 marks) 6b. Find f'(-2). [2 marks] Consider the function f (x) = 0.5x2 - 8, 7a. Find f(-2). [2 marks] 7b. Find f'(). (3 marks] 7c. Find the gradient of the graph of f at = = -2. [2 marks]