A Regression Analysis Relating a Company's Sales,their Advertising Expenditure,price,and Time

Essay

A regression analysis relating a company's sales,their advertising expenditure,price,and time resulted in the following.

a.At 95% confidence,determine whether or not the regression model is significant.Fully explain how you arrived at your conclusion (give numerical reasoning)and what your answer indicates.
b.At 95% confidence determine which variables are significant and which are not.Explain how you arrived at your conclusion (Give numerical reasoning).
c.Fully explain the meaning of R-square,which is given in this model.Be very specific and give numerical explanation.