Please answer it quickly. Don't need much detailed answer. Just show main steps

Consider this code to distinguish the elements of a set {a, b, c, d}, with P(a) = 0.5, P(b)=0.25, P(c)=0.125 and P(d)=0.125. a. 0 b. 10 c. 110 d. 111 On average, a sequence made up of a, b, c, d will use how many bits. 1.75 027 1 3 1.05 Moving to another question will save this response