You have been given a sample data set related to sales revenue and advertising expenditure in Dian packaging (Note: Data set is same as in Q2).

Sales Revenue ($ 000)	Advertising expenditure ($ 000)
35	7
37	8
45	10
47	12
51	12
55	11
60	15
72	16
75	18
74	20

Use the above data to answer the questions given below;

1. Derive a simple regression equation to show the impact of advertising expenditure on company sales revenue (round off the coefficient value to 2 decimals). (6 marks)
2. Interpret the intercept and slope coefficients in your regression equation (3 marks)
3. Predict the sales revenue if company increase their adverting expenditure up to $ 28,000.