The sales over the first three months of the year of 5 different models of cars at a distributor's showroom are summarized in the following table.

Month Kia Toyota Honda Civic Hyundai
Jan 30 40 20 45
Feb 45 53 25 55
March 35 44 25 33

a) Express the total monthly sales for each of the first 3 months as a product of 2 matrices P and Q
b) Express the sales of each model over the first three months period as a product of 2 matrices H an

Question

The sales over the first three months of the year of 5 different models of cars at a distributor's showroom are summarized in the following table.

Month     Kia    Toyota      Honda Civic       Hyundai
Jan           30     40             20                      45
Feb          45     53             25                      55 
March      35     44             25                      33

a) Express the total monthly sales for each of the first 3 months as a product of 2 matrices P and Q
b) Express the sales of each model over the first three months period as a product of 2 matrices H an