2 1 Assume that a certain company's productivity is modelled by the Cobb-Douglas production function x, 3;) : 33:3 y? , where m is the amount of money expended for labour and y is the cost of capital equipment. Assume that the company currently spends 10 units on capital equipment. (a) Find all a: such that marginal productivity of labour equals the marginal productivity of capital. (b) Find all :r, such that marginal productivity of labour is strictly less than the marginal productivity of capital. (c) Assume the company spends 5 units on labour. To increase productivity, should the company invest in capital expenditures or increase spending on labour