The population of salmon next year is given by f(S) = Ser(1-s/P), where S is this year's salmon population. P is the equation population, and r is a constant that depends upon how fast the population grows. Find f '(S0) and solve the equation f '(S0) = 1. using a calculator to find the intersection of the graphs f '(S0) and y = 1. Find the population for which the maximum sustainable harvest occurs if r=0.4 and P = 850. The maximum sustainable harvest occurs for a population of (Round to the nearest thousandth as needed.)