please do it fast and correctly

c) A company dealing with cosmetics wishes to invest in product promotion through door-to-door marketing. In a duration of Seven months, the annual sales and the amount invested in marketing was as shown below Amount Used in marketing 6 8 10 12 15 17 20 (Ksh "million) Sales (Khs 'millions) 200 190 240 210 270 280 290 By identifying the dependent and the independent variables; i) Estimate the regression line for the data (7 marks) 11) Interpret the coefficients in part (1) above (3 marks) 111) Estimate the volume of sales if the company decided to invest Ksh 25 million in door-to- door marketing (2 marks)