g Xia Co. currently buys a component part for $9 per unit. Xia believes that making the part would require $5.30 per unit of direct materials and $1.05 per unit of direct labor. Xia allocates overhead using a predetermined overhead rate of 220% of direct labor cost. Xia estimates an incremental overhead rate of $0.65 per unit to make the part. 1-a. What are the relevant costs for Xia to make or buy the part

Stocks a, b, and c are similar in some respects: each has an expected return of 10% and a standard deviation of 25%. stocks a and b have returns that are independent of one another; i.e., their correlation coefficient, r, equals zero. stocks a and c have returns that are negatively correlated with one another; i.e., r is less than 0. portfolio ab is a portfolio with half of its money invested in stock a and half in stock b. portfolio ac is a portfolio with half of its money invested in stock a and half invested in stock c. which of the following statements is correct? a. portfolio ab has a standard deviation that is greater than 25%.b. portfolio ac has an expected return that is less than 10%.c. portfolio ac has a standard deviation that is less than 25%.d. portfolio ab has a standard deviation that is equal to 25%.e. portfolio ac has an expected return that is greater than 25%.