For the equations below, q is the total number of units produced per day by m employees of a manufacturer, and p is the price per unit at which the q units are sold. Find the marginal-revenue product for the given value of m. 500m-m q= .p-0.4q+70; m 30 50 The marginal-revenue product when m = 30 is (Type an integer or a decimal.) Find all points (x,y) where f(x,y) has a possible relative maximum or minimum. Then use the second derivative test to determine, if possible, the nature of f(x,y) at each of these points. If the second derivative test is inconclusive, so state. f(xy)-x-2-27x+4y