2.4) Correlation coefficients

The following dataset gives the Na and Cl concentration (in mg/l) of pore fluids in
soils from Nova Scotia.

A. Calculate the correlation coefficient between the Na and Cl concentrations 
    (both Spearman and Pearson)
B. Draw a scatter plot of the data
C. Does this prove a physical relation between the two variables and if so, what 
     might it be?

Data

 CL         NA                CL         NA
10.6        9.4              18.6       15.2
18.5        9.4              32.3       21.2
44.5       23.1              12.9        8.3
13.2        8.6               8.6        6.3
29.8       10.9              21.9       11.9
38.5       17.4              14.8        7.6
20.9        8.0              39.0       30.8
 4.9        4.7              34.2       28.1
43.2       29.1              55.8       17.5
49.1       23.1              51.1       24.9
13.2       10.6              15.1        9.6
24.1       14.5              68.3       35.0
11.2       11.4              17.3       11.3
48.8       17.8              39.1       24.3
28.9       12.6              64.9       29.8
55.8       29.2              17.6       12.7
15.1        9.6              56.9       18.3
56.8       29.9              11.9       13.9
58.7       20.0               7.9        6.8
31.3       18.5              63.3       28.8
51.9       32.9              14.0        9.2
29.9       12.2              66.7       34.4
33.1       12.2              53.6       43.1
14.7        8.9              23.5       13.2
 8.3        6.0              34.2       14.0
 7.7        8.6              67.4       38.5
15.0        8.2              37.3       12.9
52.6       52.3              11.2        6.4
69.0       37.9              11.8        8.9
17.4       21.1               4.9        6.3
36.9       21.5               6.0        4.2
30.1       13.9              38.1       20.2
16.4       17.4              44.7       20.5
31.8       13.1              44.3       24.8
39.5       15.2              13.1       10.2
32.4       17.4