Could I have help with my math worksheet?

Exercise 4. On Thursday, you need to create 5L of a 55% alcohol solution using different amounts of the 40% and 80% solutions. You are even more tired of solving these equations everyday, so you spend some time creating a formula that will tell you how much of the 40% and 80% solutions to use to get the required amount of a solution with your desired concentration. (a) Let a: be the amount of 80% solution used, and let y be the amount of 40% solution used to make A liters of a solution that is 100 * p%. Write a system of equations that you can solve to nd a: and y. (b) Solve the equation in part (a)1 assuming 33 and A are constant. (c) Use your formula to determine the amount of 40% and 80% solutions required to create 5L of 75% alcohol solution. Exercise 5. Describe a different situation involving solutions you might encounter in the lab that could be dealt with by generalizing your formulas in Exercises 3 and 4