Assume that the Mauna Loa Lava Lamp Company is considering different types of investments

for its portfolio. It identifies the following eight investments.

a$.$ Graph the data in a manner similar to Figure $13-10.$

b$.$ Draw a curved line representing the efficient frontier.

c$.$ What two objectives do points on the efficient frontier satisfy?

d$.$ Is there one point on the efficient frontier that is best for all investors?