Q$2$: for the flat slab shown:

slab thickness $=150mm,$ column dimensions $4J0300mm$

for slab

$F^{\text{'}}c=25$Mpa,

cover to center of

$Wu=22k\frac{n}{m}2$

steel $=30mm$

a$)$ find dimensions of column strip and middle strip

b$)$ check punching shear for the red circled column