The yearly government tax revenue (in $ millions) depends on customer income, business profits, and capital gains defined as tax = -2.556 + 3.799 * income + 1.583 * profit + 0.739 * capital.

a. Interpret the numbers in this model.

b. What is the government tax revenue if a customer earns $1.2 million, the business’ profits amount to $8.63 million, and the capital gains are $5.76 million?