Question

que no 3rd plz do it

Answer 1

ii) option is true
i hope this is helpful fot u

Answer 2

The first excited state means the 2nd orbit.

That is, the total energy of this orbit is -3.4eV.

Now please remember this relation,
Total energy = negative of kinetic energy = 2(Potential energy)

Therefore the kinetic energy comes out as +3.4eV.

I'm sorry i couldn't explain theoretically.