4. Find the derivative of the following functions: y = Vx' y = x -4/7 y = sin2 x2 y = (x') (3*) X y= 3 f . x2 - 5 y = c2 + 5 g. y = (x2 - 1)' (x2 +1)25. RockHard Productions holds weekly events in an arena with a seating capacity of 15 000 spectators. With ticket prices at $12, the average attendance is 11 000 fans. A market survey indicates that for every dollar that ticket prices are lowered, the average attendance will increase by 100 fans. How should the production company set ticket prices to maximize their revenue