The marginal cost of a product can be thought of as the cost of producing one additional unit of output. For​ example, if the marginal cost of producing the fiftieth product is​ $6.30, then it cost​ $6.30 to increase production from 49 to 50 units of output. Suppose that the marginal cost C​ (in dollars) to produce x digital cameras is given by Upper C (x )equals 0.03 x squared minus 3 x plus 240C(x)=0.03x2−3x+240. How many digital cameras should be produced to minimize marginal​ cost? What is the minimum marginal​ cost?