Can anyone solve this problem? Physics Help?

A stroboscopic photo of a club hitting a golf ball, such as the photo shown in the figure below, was made by Harold Edgerton in 1933. The ball was initially at rest, and the club was shown to be in contact with the ball for about 0.0021 s. Also, the ball was found to end up with a speed of 2.1 102 ft/s. uming that the golf ball had a m of 55 g, find the average force exerted by the club on the ball. kN