Solve please

In the hydrogen atom, the electron jumps from the n = 1 level to the n = 4 level- a- During this transition from n = 1 to n = 4, is a photon emitted or absorbed? " b. What is the change in energy of the electron? o. Identify the transition on the energy level diagram below or state the transition in words. E1=-13.5 =1 Fig.1 Energy Level Diagram for Hydrogen d. What is the wavelength of the emitted or absorbed photon