The board of directors of a company has 12 members. One member is the president, another is

Question:

The board of directors of a company has 12 members. One member is the president, another is the vice president, another is the secretary, and another is the treasurer. How many ways can these positions be assigned?
a. Identify the total number of objects n and the number of objects r being chosen in order.
b. Evaluate nPr.