Mutations accumulate at a rate of 1.3 per million nucleotides during the first year of a study,

Question:

Mutations accumulate at a rate of 1.3 per million nucleotides during the first year of a study, and at a rate of 2.2 per million nucleotides during the second year. The DNA is 4.7 million nucleotides long.
Different environments can lead to different mutation rates. Use the sum rule for the Poisson to find the total expected number of mutations during an experiment by finding the expected number over the entire experiment.
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...