Orbital degeneracy in partially filled p subshells and shielding order

[Ezio3.1415]

1. We know px,py,pz are degenerate orbitals... My question is suppose in
0=[He] 2s^2 2px^2 2py^1 2pz^1
Are the px,py,pz orbitals degenerate here?

2. What is the reason of inert pair effect?

3. What is the order of shielding effect for s,p,d,f?

 

[Ezio3.1415]

Oh... no one answered... Okay can anyone only answer 1 & 3...