Finding the production function in the given case

The Production Function for Wilson Company
Economists at the Wilson Company are interested in developing a production function for fertilizer plants. They collected data on 15 different plants that produce fertilizer (see the following page).
Questions

1. Estimate the Cobb-Douglas production function Q= αL^β 1K_2^β, where Q = output; L=labor input; K =capital input; and α,β_1,and β_2 are the parameters to be estimated.

2. Test whether the coefficients of capital and labor are statistically significant.

3. Determine the percentage of the variation of output that is "explained" by the regression equation.

4. Determine the labor and capital estimated parameters and give an economic interpretation of each value.

5. Determine whether this production function exhibits increasing, decreasing or constant returns to scale. (Ignore the issue of statistical significance).

Plant Output (000 Tons) Capital ($000) Labor (000 Worker Hours)
1 605.3 18,891 700.2
2 566.1 19,201 651.8
3 647.1 20,655 822.9
4 523.7 15,082 650.3
5 712.3 20,300 859.0
6 487.5 16,079 613.0
7 761.6 24,194 851.3
8 442.5 11,504 655.4
9 821.1 25,970 900.6
10 397.8 10,127 550.4
11 896.7 25,622 842.2
12 359.3 12,477 540.5
13 979.1 24,002 949.4
14 331.7 8,042 575.7
15 1064.9 23,972 925.8