Probability using distribution(lambda)?

Thank you for reading! In this exercise, I think the lambda sign threw me off.

Here's the problem:

The number of monthly repairs on a computer (I'm guessing it was a PC, lol!) is a random variable that has the distribution with . Find the probability that the computer works for a month:

a) without need for repairs

b) with need of two repairs

Is it THIS formula? ==>

If so, what would be? I'm assuming that is given (=5.5) and I'm guessing is the number of repairs needed on the computer (which would be on "a" and on "b").

Thank you for all your help!