Someone has carelessly tossed several sets of human vertebrae into a single box. You are trying to sort out the mess and have counted 20 lumbar, 48 thoracic, and 26 cervical vertebrae. It's now clear you are missing some bones. How many bones are you missing, and what type of vertebrae are they?

W) 4 lumbar

X) 2 thoracic

Y) 2 cervical

Z) 4 thoracic
Y) 2 CERVICAL