(a) Find a value for e such that F : (yew + o$y2)i | (mew + 2:1:2y)j is conservative, and then nd a potential function for the vector eld with this choice of a. (b) For the conservative vector eld with potential function found in (a), nd I F - dr, C where C is the straight line joining the point (0, O) to (1, 2)