please help on the following

2. Credit Card: How is credit score affected by the number of credit cards you own? A Credit score is a numerical expression based on a level analysis of a person's credit files, to represent the creditworthiness of that person. For 10 individuals, we record y = credit score, x = number of credit cards owned. Consider the model X y Y = Bot Bix+z, 795 Where a's are i.i.d. N(0, 62). a) Interpret B1 in the context of the problem.(Do not use 'Slope', 715 'Intercept', 'Coefficient', etc.) 2 570 b) Find the estimated equation of the least-squares regression line. N 730 c) Use the F-test to perform the significance of the regression test 645 at a 10% significance level. Report the value of the test statistic, 725 critical value(s), and decision. 4 500 d) Construct a 95% confidence interval for Bo- e) Construct a 90% confidence interval for the average credit score 4 620 of individuals who owns 5 credit cards? U 555 5 595