2. There are 1 million fish of a certain species in a lake. While the average reproduction rate of fish is 300% per year, their natural lifespan is currently 1 year on average. The fisherman in the lake catches an average of 1/365 of all fish every day. The natural lifespan of fish is inversely proportional to the total number of fish. As the total number of fish increases, their average natural lifespan decreases at the same rate. (a) Draw the stock - ow diagram of the problem. (b) Identify the feedback loops in the problem. (c) State the formulation of the variables (d) Is the system in equilibrium? How many fish must be in the lake for it to be in balance? Can the system reach to this equilibrium state by its own