hey i need help figuring out the answer to these questions

Homework 5 Economics 4400w Due in the class on May18, 2016 The following Excel output is for 89 makes of cars manufactured in the U.S. Given the descriptive statistics it should be possible to figure out the units of measurement. MPG is miles per gallon. (a) Are the variables individually correlated with MPG in the manner you expect? (b) Do the variables in the regression have the sign that you expect? (c) Which variables are statistically significant in the regression at five percent? (d) How well does the regression .t the data? Explain. (e) What is the effect on MPG of an increase in size of car of one-quarter of a ton (where one ton equals 2,000 pounds)