(5 points) Let x and y represent the population sizes of two species at a given time. (a) Consider the two systems below, (A) and (B). Which system of equa- tions describes a situation where the two species competitive species (where both species are harmed by interaction) and which system respresents cooperative species (where both species benefit from interaction)? Explain your reasoning. (A) (B) it = 5r + 2xy dt = 3.x (1 - dy = Ay + 3.ry dy = 2y(1 10 - Fry (b) Describe a real-world context in which we might see a system with a nodal sink. Explain why your context fits the conditions for having an equilibrium which is a nodal sink