After several years of decline, the market for hand-made acoustic guitars is making a comeback. These guitars are usually made in small workshops employing relatively few highly skilled luthiers. Assess the impact on the equilibrium price and quantity of hand-made acoustic guitars as a result of each of the following events. In your answers indicate which curve(s) shift(s) and in which direction.

a Environmentalists succeed in having the use of Brazilian rosewood banned in the United States, forcing luthiers to seek out alternative, more costly woods.

b. A foreign producer reengineers the guitar-making process and floods the market with identical guitars.

c. Music featuring handmade acoustic guitars makes a comeback as audiences tire of heavy metal and alternative rock music.

d. The country goes into a deep recession and the income of the average American falls sharply.