Answer
a) a
b) a, b, c, d, f , h, j , q, t
c) e, g, i, k, l,m, n, o, p, r, s, u
d) q, r
e) c
f) p
g) f , b, a
h) e, f, l, m, n
Work Step by Step
a) "a" vertex is the root
b) "a,b,c,d,f,h,j,q,t" vertices are internal
c) "e,g,i,k,l,m,n,o,p,r,s,u" vertices are leaves
d) " q,r" vertices are children of j
e) "c"vertex is the parent of h
f ) "p" vertices are siblings of o
g) "f,b,a" vertices are ancestors of m
h) "e,f,l,m,n" vertices are descendants of b
