can someone work this out for me

1. A company has recorded data on the weekly sales for its product (v) and the unit price of the competitor's product (x). The data resulting from a random sample of seven weeks follows. Use Excel's Regression tool to answer the following questions: Week 1 2 Ja UN- Price 0.33 0.25 0.44 0.40 0.35 0.39 0.29 4 5 Sales 20 14 22 21 16 19. 15 a What is the sample size (how many observations What is the estimated regression equation? i. Write out the theoretical model. b ii. Write out the estimated model