please help answer/explain parts D and E. thank you

IThe following information below was obtained by using paired data consisting of weights in lb) of 27 cars and their highway fuel consumption amounts (in mi/gal). 9 = 204.32 .05747, R = .649, = 2300, y = 72.3 (Use a = .03) a) Interpret R2 in the context of the problem. Is this a good model? Explain. b) What is the linear correlation coefficient? c) Perform an appropriate significance test to determine whether there is suffi- cient evidence to support the claim of a linear correlation between the two variables. d) Perform an appropriate significance test to determine whether there is suffi- cient evidence that the weight of a car is a good linear predicator for highway fuel consumption. e) Based on your result from parts (c) and (d) predict the amount of fuel con- sumption for a car that weights 4000 lb