Amazon’s third-largest market is the United Kingdom. In 2019, the employees at a local firm in London received their salary and decided to spend a portion of it on making online purchases from Amazon. The probability that the online purchases will be shipped on time to each employee is 0.68. Determine the following:

a. The probability that three products will be shipped on time.

b. The probability that out of three, two products will be shipped on time.