Given the following table:

Probability X Y

20% 15% 30%

60% 25% 18%

20% 30% 20%

Calculate a) the covariance of X and Y, and b) the correlation coefficient.

Select one:

a. a) -20.64% b) -0.90

b. a) -20.18% b) -0.88

c. a) -17.89% b) -0.78

d. a) -19.20% b) -0.84

e. a) -18.35% b)-0.80