. For a Student's distribution with 15 degrees of freedom, find the value of t such that (a) to area of the right of t is 0.01, (b) the area to the left of t is 0.95, (c) the area to the right oft is 0.10, (d) the combined area to the right of t and the left of-t, is 0.01, (e) the area between -t and t is 0.95.