Solve the following by Pearson r and test the significant correlation at 5% tabular value. Interpret the results.

a. x: 14 16 13 17 12 15 15 19 13 10 19

y: 56 34 43 36 36 44 65 54 39 45 49

b. x: 15 15 47 38 36 24 24 24 34 25

y: 68 69 70 66 72 62 63 68 62 64

c. x: 35 45 62 41 36 45 65 57 54 65

y: 23 22 24 27 29 26 23 27 29 21