a: (a)What is the probabity that the tirst coalescent eventhappets 1 encration ago?(6) What is
the probability that the first coalescent event happens 2 generation ago? (c) What is the probability that no coalescent events occur within the first 4 generations? (d) What is the probability that all 4 lineages coalesce within four generations (that is to say that all for lineages have found the single common ancestor by 1, 2, 3, or 4 generations ago)? Note, you should assume that at most only 2 lineages can coalesce in a given generation. (Hint: In a sample of 4 lineages, there will be 3 coalescent events. Write out the possible scenarios of when each of the 3 coalescent events could occur and find the probabilities of each).
