hydrogen line spectra

The hydrogen line spectrum provides evidence for the

Among the first lines of Lyman, Balmer, Paschen and Brackett series in hydrogen atomic spectra which has higher energy?

The ratio of the largest to shortest wavelength in Balmer series of hydrogen spectra is,

The ratio of the longest to shortest wavelength in Brackett series of hydrogen spectra is

The ratio of the largest to shortest wavelength in Lyman series of hydrogen spectra is

Using Bohr's postulates, obtain the expression for the total energy of the electron in the stationary states of the hydrogen atom. Hence draw the energy level diagram showing how the line spectra corresponding to Balmer series occur due to transiton between energy levels.