8.) Evaluate the line integral $\int_C xe^{2y}ds$, where C is the first quarter of the unit circle oriented in the counter-clockwise direction from (1,0) to (0,1).
9.) Find a potential function f such that $\nabla f = F$ where F =
10.) Using F = $(2xe^{x^2+y^3} + 3x^2)i + (3y^2e^{x^2+y^3} + 2ycos(y^2))j$.
the line segment joining (0,2) and (4,0)