How much energy is required to ionise hydrogen atom which is already in its first excited state?

The groud state energy of hydrogen atom is -13.6 eV. The energy needed to ionise hydrogen atom form its second excited state in eV is

Fill in the blanks spaces with appropriate answers: The ratio of the energies of the hydrogen atom is first state and third excited state is _________.

The ionisation energy of hydrogen atom is 13.6 eV. The energy of an electron in the first excited state of hydrogen atom is