i don't know if my answers are correct. Please tell me the answer if I am incorrect and show your work as well

Problem 2: Medical Imaging (textbook 5.3.59) Medical imaging devices like CT scans work by passing an X-ray beam through part of the body and measuring how much the intensity of the beam attenuates (i.e. how much the intensity of the X-ray is reduced when it passes through the other side of the tissue). The amount of attenuation depends on the density and composition of the tissue (e.g. bone \"absorbs\" more of the X-ray beam than soft tissue). A. If A(z) is the attenuation rate at position x in the tissue and L is the thickness of the tissue through which the beam passes, what is the total attenuation of the beam during this procedure? o B. Suppose the attenuation rate is constant through the tissue, with A(x) = a. What would the total attenuation be? !O C. Suppose the attenuation rate A(z) falls between minimum and maximum values, o