Sarah will buy bracelets and necklaces in order to sell them in her schools fund raising activity. The bracelets cost $2 and the necklaces cost $3. She does not want to spend more than $300. Total number of bracelets and necklaces Sarah needs to buy is at least 120. a. Write a system of inequalities. b.Graph the system of inequalities and shade the solution set. c. At least how many necklaces does Sarah need to buy? Explain your answer.