Find the average rate of change of the function over the given intervals.

h(t) = cott

a.

b.

兀

3元

4'4

5л

3元

6

'2

AThe average rate of change over

3л

4

(Type an exact answer, using i as needed.)

BThe average rate of change over

5л

: 3л

6'2

(Type an exact answer, using a as needed.)