Answer
Level 0: $a$;
Level 1: $b, c, d$;
Level 2: $e, f, g, h, i$ (in alphabetical order);
Level 3: $j, k, l, m, n, o, p$;
Level 4: $q, r, s$ ;
Work Step by Step
The level of each vertex of the rooted tree in given is:
Level 0: $a$;
Level 1: $b, c, d$;
Level 2: $e, f, g, h, i$ (in alphabetical order);
Level 3: $j, k, l, m, n, o, p$;
Level 4: $q, r, s$;
