please show all the work necessary to finish the assignment I really need to see all the steps in order to understand where I'm failing doing my assignment.

5. (8 pts.) Let the supply and demand for portable DVD players in dollars be given by supply: p =190-15q; demand: p =75 + 8q (a) Graph these equations on the same grid using graph paper and a scale that makes the graph large and easy to read. Label the horizontal and vertical axes appropriately. You may use Desmos to help. (b) Use algebra to find the equilibrium quantity. (c) Use algebra to find the equilibrium price. (d) At a price of $100, is there a surplus or a shortage of supply? Explain your reasoning.\f1. (12 pts.) Use graphical methods to maximize z = 4x + 3y subject to 3x - 2y