can you help me understand what I need to do for each sub question? I have no idea how.

10.) Use the least squares method to fit a multivariate linear model that relates the annual number of Australian wines sold in Canada to the average price per bottle, the advertising expenditures in North America (in thousands of dollars), the % market share of a wine brand, and the % growth of a wine brand.

a. State what your model is.

b. Determine whether the independent variables are significant or not (at an -level of significance = 10%).

c. Which independent variable is most significant in explaining the number of bottles sold? Which is least significant?

d. Is your overall model significant? Provide statistical proof.

I really appreciate the help, thank you,

if u can't answer these, at least explain what to do