K dw For the functions w=7x2-8y2, x-cost, and y sint, express- dt Express dw dt dw dt as a function of t > Part 1 of 2 HW Score: 74.25%, 14.85 of 20 points Points: 0.45 of 1 as a function of t, both by using the chain rule and by expressing w in terms of t and differentiating directly with respect to t. Then evaluate dw I dt at t=3-