4. The data below shows the price data for 10 used cars from well-known brands, along with the variable age of the car (years), and the distance traveled (000km) from the car.

Age of the car (years)	1	2	3	4	5	6	7	8	9	10
The distance traveled (000km)	8,1	17,0	12,6	18,4	19,5	29,2	40,4	51,6	62,6	80,1
Price (hundred million)	5,4	4,8	5,0	4,0	3,7	3,2	3,2	2,7	1,9	1,5

use multiple regression analysis for
a. Determine the regression model for car prices using mileage and age variables.
b. Determine model testing with 2 types of testing.
c. Determine R^2 (coefficient determination) and explain what it means.
d. Provide interpretation of the coefficient of the two independent variables.