kindly answer part 2, 3 and 5 .

2. Find the range (in centimeters) in aluminum of 4.0-MeV 3He and ?H. 3. Calculate the energy loss AT of protons, deuterons, and a's between 10 and 200 MeV in passing through a 2-mm thickness of solid plastic scintillator. Plot AT against T. 4. Calculate and sketch the range of protons in Nal for energies between 1 and 100 MeV. (Extrapolate as necessary from Figure 7.2.) 5. The immediate environment of an accelerator or reactor contains large fluxes of y rays of energies in the vicinity of 5-10 MeV. What thickness of lead is required to reduce the photon intensity by a factor of 1012