When playing fortissimo (very loudly), a trumpet emits sound energy at a rate of 0.800 W out

Question:

When playing fortissimo (very loudly), a trumpet emits sound energy at a rate of 0.800 W out of a bell (opening) of diameter 12.7 cm.
(a) What is the sound intensity level right in front of the trumpet?
(b) If the trumpet radiates sound waves uniformly in all directions, what is the sound intensity level at a distance of 10.0 m?