Using R Studio, I am stuck on my last two homework questions. They involve t-statistics and hypothesis testing.

2.6 Using R's pt() function, what is the probability that we would see a t-statistic that large or larger if the null hypothesis were true, for a one-tailed test (remember to use the right degrees of freedom)?Can we reject the null hypothesis at the 0.05 level for the one-tailed test? Can we reject the null hypothesis at the 0.05 level for a two-tailed test?

3.5 Assuming a null hypothesis that there is no difference in callback rates between white people with a criminal record and white people without a criminal record, what is the probability that we would observe a difference as large or larger than the one that we observed in a sample of this size? Use the normal distribution and the correct probability for a two-tailed test.