show work:Please help: An x-ray tube operates at tube current 150 mA and 100 kVp. As discussed in class, x-rays emerging from the anode demonstrate a linear profile of energies - a maximum number of photons near energy 0 which decreases linearly to 0 photons emitted right at the maximum electron energy. These x-rays then pass through the 1.5-mm-thick glass (density g = 2.6 g/cm2 ) which encloses the cathode/anode assembly and a layer of 0.5-mm-thick tin (density Sn = 7.3 g/cm2 ) to futher filter the beam. What fraction of photons of energies 20 keV, 40 keV, and 60 keV are unattenuated and proceed to the patient? (mass attenuation coefficients for glass: at. 20 kev = 2.297 E+00 cm^2/g, 40 kev = 4.341 E-01 , 60 kev = 2.417 E-01. for tin: at 20 kev = 2.146 E +01 cm^2 /g , at 40kev = 1.942 E +01, at 60 kev = 6.565 E+00 )