homework question

the Agnes Corporation in the state of recession is estimated to be -24% and the return on Agnes in the state of boom is estimated to be 34%. The return on the Cameron Corporation in the state of recession is estimated to be 42%

and the return on Cameron in the state of boom is estimated to be -20%. Given this information, what is the covariance between Agnes and Cameron if there is a 0.70 probability that the economy will be in the state of boom and a 0.30 probability

that the economy will be in the state of recession.