The above figure shows four different markets with changes in either the supply curve or the demand curve. Which graph best illustrates the market for computers after technological advances in making computers occur?

On June 2, 2017, Diamond Chemical Corporation’s 4.1 percent coupon bonds, with face values of $100, was sold for $95. This means that the yield on these bonds was

A. less than 4.1 percent. B. equal to 4.1 percent. C. equal to 95 percent of 4.1 percent. D. greater than 4.1 percent.

If economic activity increases, it follows that economic welfare:

A. may increase, decrease, or remain unchanged depending on the nature of the increase in economic activity. B. increases as more goods and services become available. C. does not change since it does not depend on the level of economic activity. D. decreases as more resources are depleted.