Q1. (a) Consider the following estimated model: P = 950 + 200 Male +0.76 Income (Model 3) where Y is the monthly spending (in RM), Male = 1 if male, otherwise, Income is the monthly income and i refers to the i-th respondent (1) Sketch Model 3 to show the spending differences between male and female. (8 marks) (ii) Can you assign another dummy variable to indicate female in Model (3)? What is estimated value for its estimates? Interpret. (7 marks)