You can spend at most $21 on fruit. Blueberries cost $4 per pound, and strawberries cost $3 per pound. You need at least 3 pounds of fruit to make muffins. a. Write and graph a system of linear inequalities that represents the solution. b. Identify and interpret a solution of the system. Check your answer. c. Use the graph to determine whether you can buy 4 pounds of blueberries and 1 pound of strawberries Explain your reasoning​