can you please help me solve this? i am stuck

I am tracking the number of birds I hear when I eat lunch outside for 15 minutes. My long running average is 2 birds. Let X = the number of birdsl hear. it has a poisson distribution with a parameter of 2. The table below shows values of x and the probability of each value of x. I rounded the decimals to two places. a. What is the probability of hearing 2 or fewer birds? E b. What is the probability of hearing more than 2 birds? E c. Why does the sum of the ptx) column not equal 1? Write out your answer on your paper. {2 points}