Illustrate how each of the following will affect aggregate supply and explain your reasoning.

a. The implementation of artificial intelligence in manufacturing has led to faster-than-expected productivity growth.

b. Low levels of output across the entire economy leave many businesses with excess capacity, leading them to lower their prices by 3%.

c. A bill is passed in Congress that increases the federal minimum wage from $7.25 an hour to $15 an hour.

d. The U.S. dollar depreciates relative to the Chinese yuan.