4. For each equation below, determine an equation for the line tangent to the graph at the given point. (a) y = r' Inc, at (x, y) = (e, e2) (b) y = -, at (x, y) = 2, 2 5. Compute the derivative of each of the following functions. Simplify the resulting expressions. (a) U(t) = sin(t2) + cos(t2) (b) V(t) = sin?(t) + cos?(t) (c) W(t) = (sin(t) + cos(t))