What is the power of each of the following studies, using a t test

Practice the problem #8 pg. 270: What is the power of each of the following studies, using a t test for dependent means (based on the .05 significance level)? To complete this question review the chart located on #8 pg. 270. 

The chart is read as: 

Study Effect Size N Tails 

a) small 20 one 

b) medium 20 one 

c) medium 30 0ne 

d) medium 30 two 

e) large 30 two