Consuelo is buying flavored coffee and plain coffee. The total amount of money she spends on coffee is T=5.50p+7f, where p represents the cost of a package of plain coffee and f represents the cost of a package of flavored coffee. a. If Consuelo has $40 to spend on coffee, describe the constraints on the formula.
b. Solve for f.
c. If Consuelo needs to buy 3 packages of plain coffee, what is the maximum number of packages of flavored coffee she can buy?