Given a Random Variable That Has a T-Distribution with the Specified

Given a random variable that has a t-distribution with the specified degrees of freedom, what percentage of the time will its value fall in the indicated region?
15 degrees of freedom, between -2.131 and 2.131
______________ (Enter as a decimal percent or use the % sign.)
19 degrees of freedom, between -2.539 and 2.539
______________ (Enter as a decimal percent or use the % sign.)
23 degrees of freedom, between -1.319 and 1.319
______________ (Enter as a decimal percent or use the % sign.)
10 degrees of freedom, between -3.169 and 3.169
______________ (Enter as a decimal percent or use the % sign.)