How to solve this?Answers part wise please?

The next 8 questions refer to the following: A producer is hiring 32 units of labour and 17 units of capital (bundle A). The price of labour is $10, the price of capital is $70. Marginal Product of labour is equal to 160 and Marginal Product of capital is equal to 280. Beginning at A, if the producer decreases expenditures on labour by $1 and increases expenditures on capital by $1, then cost remains constant and output by units. Beginning at A, decreasing capital by one unit enables the producer to hire additional units of labour, which leads to an in output by units. The producer should use labour and capital. If MPk equals 80 in equilibrium, then MP, will be