This will be 25 pts whoever answers this difficult question!!!!! PLZ!!!!!

Delaney would like to make a 5 lb nut mixture that is 60% peanuts and 40% almonds. She has several pounds of peanuts and several pounds of a mixture that is 20% peanuts and 80% almonds. Let p represent the number of pounds of peanuts needed to make the new mixture, and let m represent the number of pounds of the 80% almond-20% peanut mixture.
(a) What is the system that models this situation?

(b) How many pounds of peanuts and how many pounds of the 80% almond-20% peanut mixture will she need?