Compute the covariance of returns between General Motors (GM) and the mar- ket inder (M). (i) Can you write out the covariance formula ? (ii) Can you compute the covariance ? s Economy GM's return Market return Probability (TGM,s) (rm,s) (ps) 1 Expansion 0.1 0.1 1/3 2 Normal 0.2 0.3 1/3 3 Recession -0.2 -0.3 1/3 Sum: 1