Use StatKey and the appropriate distribution with given parameters to find the area described.

a. Find the area to the right of 75 in the distribution (62.5, 4.85). Round your answer to three decimal places. Include a sketch or StatKey image of your distribution for full credit.

b. Find the area to the left of -2.17 for a t-distribution if the sample has size n = 13. Round your answer to two decimal places. Include a sketch or StatKey image of your distribution for full credit.

c. Find the area to the left of -2.17 for a standardized normal distribution (0, 1). Round your answer to three decimal places. Include a sketch or StatKey image of your distribution for full credit