Imagine a predator–prey interaction in which a certain number of the prey population cannot be eaten because of a refuge in their environment that the predator cannot enter.(a) why might interaction terms like −s(p − w)q and v(p − w)q be reasonable in the modeling equations? explain what those interaction terms mean? (b) what is the meaning of w? (what does the variable stand ) in a biologically realistic model, can p < w? why or why not?