6. On average, 30-minute television sitcoms have 22 minutes of programming (CNBC, February 23, 2006). Assume that the probability distribution for minutes of programming can be approximated by a uniform distribution from 18 minutes to 26 minutes.

a. What is the probability a sitcom will have 25 or more minutes of programming?

b. What is the probability a sitcom will have between 21 and 25 minutes of programming?

c. What is the probability a sitcom will have more than 10 minutes of commercials or other nonprogramming interruptions?