WH 3: (9.4, 9.5) Write neatly. Always give enough work and clear explanation. This assignment has 30 possible points, but it will be weighted as 15 maximum points in the gradebook 1. [5pts] Use the definition of the derivative to show that f'(x) = -5 for f (x) = 4 - 5x. To receive full credit, clearly show all the 4 steps from Section 9.4. 2. [15pts total] Use the derivative rules from text section 9.5 to find the derivative of each function. Give answers with no negative exponents. a. [6pts] f (x) = 5 -7.4x - x4.7 b. [9pts] h(x) = -8x-3/4 -6Vx 2 3 x5