PLEASE HELP 01.04 MC)
What is the sign of the product (-7)(-2)(-5)(1)? (5 points)

Negative, because the products (-7) (-2) and (-5) (1) are negative and the product of two negative numbers is negative
Positive, because the products (-7)(-2) and (-5)(1) are positive, and the product of two positive numbers is positive
Positive, because the products (-7)(-2) and (-5)(1) are negative, and the product of two negative numbers is positive
Negative, because the product (-7)(-2) is positive, and the product (-5)(1) is negative and the product of a positive and a negative number is negative

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 ?