Um I am very much stuck Am I doing this right so far? What else am I missing/need to put?

Problem:
A high school softball diamond is a square. The
distance from base to base is 30ft. To the nearest foot,
how far does the catcher throw the ball from home plate
to second base?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?