Thinking (10 marks) 6. If fort) : 3 and f'(4) : 5, find g'(4) where gfx) : x). (3 marks) 7. Given f(x) : axZ + bx + c , determine the values of a , b , and c if: f'(x) : 6x + 3 and f(2) : 1. (3 marks) 8. Determine the equation of the tangent line to the curve y = x2 3x + 4 at x : 2. (4 marks)