Find the t-value(s) for each of the following cases. Round your answers to 3 decimal place. Enter negative values as negative
number.
a. Upper tail area of .10 with 12 degrees of freedom is -------------------.

b. Lower tail area of .005 with 50 degrees of freedom is 2.678.

c. Upper tail area of .20 with 30 degrees of freedom is 1.310.
d. Where 98% of the area falls between these two t-values with 25 degrees of freedom.
(-------------------)
e. Where 95% of the area falls between these two t-values with 40 degrees of freedom.
(------------------)