what is the power of each of the following studies using a t-test for dependet means based on the .05 significance level?

what is the power of each of the following studies using a t-test for dependet means based on the .05 significance level? The answer is ths but. Working it out is difficult.study effect size N tails?A small .20 one .22B medium .20 one .71C medium .30 one .86D medium .30 two .77E long .30 two .99