4) The owner of a small store sends an email to everyone on her mailing list every 4 days. She changes her window display very 6 days. Today, she sent the email
and changed the display.
Part A: In how many days, will the owner send the email and change her display
on the same day?
Part B: Today is June 1. There are 30 days in June. What are the next three dates
that the owner will send the email and change the display on the same day?

Exercise: counting committees 0.0/2.0 puntos (calificable) we start with a pool of n people. a chaired committee consists of k≥1 members, out of whom one member is designated as the chairperson. the expression k(nk) can be interpreted as the number of possible chaired committees with k members. this is because we have (nk) choices for the k members, and once the members are chosen, there are then k choices for the chairperson. thus, c=∑k=1nk(nk) is the total number of possible chaired committees of any size. find the value of c (as a function of n ) by thinking about a different way of forming a chaired committee: first choose the chairperson, then choose the other members of the committee. the answer is of the form c=(α+nβ)2γn+δ. what are the values of α , β , γ , and δ ?