How is the fraction decomposed in the fraction model? (3 points) A fraction strip partitioned into eight parts. The first part is shaded blue. The second, third, and fourth parts are shaded orange, the fifth and sixth parts are shaded green, and the seventh part is shaded red. Below is the fraction seven eighths.

a two eighths plus two eighths plus two eighths plus one eighth
b one eighth plus two eighths plus two eighths plus four eighths
c one eighth plus three eighths plus two eighths plus one eighth
d three eighths plus one eighth plus two eighths plus three eighths

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 ?