a) Design an x-ray tube such that the target material emits x-rays with 0.56 Angstrom wavelength in the K-alpha emission line. (4 pts) b) What other candidate materials else than W can you find as refractory? (4 pts) c) How would you operate this x-ray tube? What potential difference would you need to obtain x rays with 0.56A wavelength? (4 pts) d) What would be the K-beta emission line in your design? (4 pts) e) Search the literature and describe how you can filter out the K line from your spectrum and monochromatize your x-ray emission system. (4 pts)