screen, 0.9; optics, 0.9; and television system, 0.9. What is the composite MTF of the system? 3. For roentgenium (Rg, Z=111), the electron binding energies are Shell K L M Eb (keV) 132.85 20.42, 19.82, 18.22 11.17, 10.91, 10.55, 10.12, 10.04 What are the characteristic x-ray energies produced by bombarding a roentgenium target with 120-keV electrons? What are the characteristic x-ray energies produced from the same target with 140-ke V electrons? (In both cases, consider only transitions to fill a vacancy in the K-shell.)