Please answer ALL PARTS.

A quantization volume V has one and only one of its photon modes excited into a coherent state such that the average number of photons in the volume (12.) = 1. Find a) The probability to find two photons in that mode. b) The probability to find three or more photons in that mode. c) Repeat part a) when the coherent state of the mode has (n) = 100. You may Stirling's approximation n! m \"211'\". n" e'\" useful, which is good to 2% for n = 5 and increasingly accurate as n grows