How can this entire problem be done in a TI-84 Calculator????

The number of hits to a website follows a Poisson process. Hits occur at the rate of 12.2perminute between7:00 PM1200 P.M. Given below are three scenarios for the number of hits to the website. Compute the probability of each scenario between 11:29P.M. 11:30 P.M. Interpret each result.

a) exactly seven

b) fewer than seven

c) at least seven