A technician services machines of companies operating in the Phoenix Area. Depending on the

A technician services machines of companies operating in the Phoenix Area. Depending on the type of malfunction, the service call can take exactly 1,2,3,4 hours. The different types of malfunctions occur at the same frequency.

Develop a probability distribution for the duration of a service call.

Duration of call (x) f(x)
1
2
3
4

What is the probability that a service call will take three hours?
What is the probability that a service call will take more than 2 hours?