The Delta Co. owns retail stores that market home building supplies.​ Largo, Inc. builds single family homes in residential developments. Delta has a beta of 1.22 and Largo has a beta of 1.34. The riskminus free rate of return is 4 percent and the market risk premium is 6.5 percent. What should Delta use as their cost of equity if they decide to purchase some land and create a new residential​ community?