A force in the + x-direction has magnitude F = b/xn, where b and n are constants. (a) For n > 1, calculate the work done on a particle by this force when the particle moves along the x-axis from x = Xo to infinity. (b) Show 1hat for 0 < n < 1, even though F becomes zero as x becomes very large, an infinite amount of work is done by F when the particle moves from x = Xo to infinity.