3. Evaluate the line integral Sc(x – 3y2) ds where C is the straight line segment from (0,1,1) to (3, -2, 2), and assign the result to q3. 4. A piece of wire is in the shape of the circle x2 + y2 = 1. The density at any point is given by f(x, y) = x2 + y4. Find the mass of the wire using a line integral and assign the result to q4.