va rog sa ma ajutați rapid

a)
Centru: M
Raze: MK, MN, MT, MS, MR, MP
Diametre: KS, NR, TP
Coarde: PR, ST
b)
Centru: X
Raze: XY, XN, XV, XZ, XW
Diametre: YV, ZN
Coarde: WY, EF, FV