(Two Products) Consider two products, A and B. Demands for both products are normally distributed… 1 answer below »

(Two Products) Consider two effects, A and B. Demands for twain effects are normally nice and possess the selfselfsame moderation and model hiatus. The coefficient of departure of call-for for each effect is 0.6. The estimated correspondence in call-for betwixt the two effects is −0.7. What is the coefficient of departure of the completion call-for of the two effects? [17.2]