$($You may select more than and double click the box one answer. Single click the box with the question mark to produce a check mark for a correct answ automatically graded as incorrect.$)$

Wheel is a level $2$ item in the WBS$.$

$?$ Seat is a level $2$ item in the WBS$.$

Back brakes are a level $3$ subdeliverable item in the WBS$.$

Frame is a major deliverable in the WBS$.$

Bicycle is a major deliverable in the WBS$.$