The following is the data of PT Car employees in 2019. This can explain the relationships between employee work experience and car sales. 

The name of the Employee written in a number (numeric)	Work experience (in years)	Car sold (in unit)
1	1	80
2	3	97
3	4	92
4	4	102
5	6	103
6	8	111
7	10	119
8	10	123
9	11	117
10	13	136

Question:
a. Determine a simple linear regression equation that can be used to predict car sales based on work experience. (Weight 25)
b. Calculate SST, SSR and SSE values (Weight 25)
c. Calculate the coefficient of determination r2 (Weight 25)
d. Make a scatter diagram of the car sales data (Weight 25)