Can someone explain how to solve this

What is the effect of presidential system versus parliamentarian system on people's opinions about cheating on taxes? Researchers estimated the following equation using data on people's opinions about cheating on tax (cheat: an index between 1 and 10, where 1= cheating is not justified at all, and 10=cheating is totally justified) on an index of presidential systems (presidentard errors of coefficients are in parenthesis) cheat = 3.6 + 0.805presid n = 26 R2 = 0.164 (0.13) (0.211) 1. Is the effect of the presidential system statistically significant at the 5% level (Critical Value=2)? Write the null and alternative hypotheses for the test of statistical significance and calculate the test statistic. Do you reject the null hypothesis? Clearly explain your answer. 2. Interpret the R-squared of the regression