A cable that weighs 55 N/m is used to lift ore that weighs6060 N from the bottom of a well 150150 metres below. a) Suppose that at a given moment, xx metres of cable has been lifted to the surface. Therefore the amount of work required to lift the cable x metres is approximately w(x)x. What is w(x)? (as a function of x)

b) What is the total work required to lift the ore to the surface? (in joules)