The fuel consumption of an automobile is not constant. Fuel economy depends largely on the speed of the vehicle. The function F(v)= - 8v³/10,845 + 302v²/1205 - 2288v/723 + 90 (F(v) is in miles per gallon) describes the fuel consumption of a new hybrid vehicle, where 0 < 95 is the velocity of the vehicle. Which velocities yield maximum efficiencies? (Remember, high efficiency means low consumption.) Round your answer to one decimal place. If necessary, round any intermediate calculations to six decimal places. Enter DNE if there is not a local extremum.