Subject    ACT    GPA 1^st year     GRE Psychology
                            of college          Subject Test

1             18         3.0                     280

2             21         2.8                     320

3             26         3.2                     380

4             29         4.0                     550

5             32         3.7                     520

Calculate the correlation coefficient between 1) ACT and GPA, 2) ACT and GRE, & 3) GPA and GRE