please answer all!

a. College graduates continue to earn significantly more than high school graduates. In fact, the wage college graduates earn has been increasing to almost twice as much as that of high school graduates. Assume graduates in 2013 earn $34,632, $36,034,$44,592, $36,072, $71,703 and $44,768.

What is the standard deviation for this sample? (Round your intermediate calculations and final answer to the nearest whole number.)

Standard deviation

$

b.

Use the following table:

Value	Frequency
25	5
29	4
5	30
25	5

Find the weighted mean. (Round your answer to the nearest tenth.)

Weighted mean