Please help me with questions 3 and 4

3. Can a pretest on mathematics skills predict success in a statistics course? The 55 students in an introductory statistics class took a pretest at the beginning of the semester. The least-squares regression line for predicting the score y on the final exam from the pretest score x was y = 10.5+ 0.82x . The standard error of b was 0.38. Test the null hypothesis that there is no linear relationship between the pretest score and the score on the final exam against the two-sided alternative. 4. Here are the golf scores (again) of 12 members of a college women's golf team in two rounds of tournament play. (A golf score is the number of strokes required to complete the course, so that low scores are better. ) To what extent may we predict the second round score from the first round score? Player 1 2 3 4 5 Round 1 6 7 8 9 89 90 10 11 87 95 86 12 Round 2 81 94 102 105 85 83 88 89 89 81 91 76 79 107 89 87 91 88 80 Run a significance test that there is no relationship between the first round and second round scores