2.2 A company must purchase five kinds of material. The following table gives the price the company pays per ton for each material, along with the number of tons purchased in the months of May, June, and July: Quantity purchased (tons) Material Price (S/ton) May June July 300 550 400 250 500 Use MATLAB to answer these questions: a) What is the total spent in May? in June?, and in July? b) What is the total spent on each material in the three-month period? c) What is the total spent on all materials in the three-month period