Pharmacology Equivalent Dose of Organ

"As a result of the single intake of 6.3x10^3 Bq of a radionuclide, a certain organ will receive doses of 0.2 mGy from a low energy beta particles and 0.05 mGy from alpha particles during the next 50 y. These are the only radiations emitted and this organ is the only one that receives appreciable radiation as a result of the intake. The organ has a weighting factor of 0.05. a) What is the committed equivalent dose to the organ? b) What is the committed effective dose to the individual? c) What is the ALI for this route of intake? "