How does Bohr’s theory explain hydrogen spectrum ?

Bohr's model can explain

Which theory explains photoelectric effect?

The first member of Balmer series in hydrogen spectrum has a wavelength of 6563overset@A .What will be the wavelength of Lyman series in the same spectrum ?

State Bohr’s postulates for hydrogen atom.

Explain energy level diagram for the Hydrogen atom and show different series in hydrogen spectrum.

Explain Energy level diagram for the Hydrogen atom and show different series in Hydrogen atom spectrum.

The energy of the second Bohr orbit in the hydrogen atom is -3.41eV. The energy of the second Bohr orbit of He^(+) ion would be :