Help please....

Dr. Wong is a veterinarian who sees only dogs and cats. In each appointment, he may or may not give the animal a vaccine. The two-way frequency table summarizes Dr. Wong's 60 appointments last week. Vaccine No2 vaccine Let cat be the event that a randomly chosen appointment (from the table) involved a cat. Let no vaccine be the event that a randomly chosen appointment (from the table) did not include a vaccine. Find the following probabilities. Write your answers as decimals. (If necessary, consult a list of formulas.) (a) P(cat) =[I] (b) P(no vaccine and cat) = I] (c) P(no vaccine | cat)