4. AIG and Met Life sell life, health, and disability insurance. Sales for March and April are given below. LIFE HEALTH DISABILITY LIFE HEALTH DISABILITY 25,000 0 8,000 55, 000 20,000 10,000 M = AIG 35,000 18,000 11,000 AIG 65, 000 0 7,000 MET LIFE MET LIFE (a) (4 pts) Find a matrix Tsales that would give total sales for the months of March and April. (b) (2 pts) Find a matrix Mavs that would give the monthly average for sales for the months of March and April. Round to the nearest whole dollar