Please help. -0.036 is incorrect.

Consider the expected outcomes of Projects A and B: State of Nature Probability of Occurrence Project A Return Project B Return Recession 0.25 0.06 -0.20 Average Growth 0.50 0.03 0.08 Prosperity 0.25 -0.06 0.40 What is the covariance of Projects A and B? -0.009 0 -0.036 0.009 O 0.036