Calculate the correlation coefficient between stock A and bond B, given the following information.

Total investment = 10,000

8,000 invested in stock A, 2,000 invested in stock B

Situation 1 - Good economy state, probability = 0.7, stock A return = 15%, bond B return = 4%

Calculate the correlation coefficient between stock A and bond B,

Situation 2 - Bad economy state, probability = 0.3, stock A return = 6%, bond B return = 8%