need help with the ones marked wrong

For a t distribution with 18 degrees of freedom, find the area, or probability, in each region. (Round your answers to three decimal places.) (a) to the right of 1.734 0.050 (b) to the left of 1.330 0.899 (c) to the left of -2.552 0.050 X (d) to the right of 2.101 0.975 X (e) between -1.734 and 1.734 0.900 (f) between -2.552 and 2.552 0.980