Determine the moment needed at the base of 40m tall 02m diam

Determine the moment needed at the base of 40-m tall, 0.2-m diameter flag pole to keep it in place in a 25 m/s wind? If a 3-m by 4-m flag is attached to the top of the pole, what would be the moment needed (Use Fig. 9.32 for drag coefficient data for flags).

the moment needed the base of 40m tall 0.2m diamter flag to keep in the place