Sir i am stuck for this question

Exercise 1: Production in a factory In a company, the production of 100 chainsaws is carried out by 2 machines A and B. Machine A produces 60 chainsaws; 20% of them are defective. 5% of the saws produced by machine B are defective. 1) Complete the cross tabulation below. Machine A Machine B Total Defective saws Non-defective saws Total 2) Of all the machines that are produced, what is the probability that one of them is defective? 3) Calculate the probability that a chainsaw is defective and produced by machine A.4) Determine the probability of a chainsaw being made by machine B knowing that it is not defective