i need the answers with explanations in words. 1522 customers at a…

i need the answers with explanations in words.
1522 customers at a major retailer were surveyed whether or not they made a purchase and were satisfied with the service they received. The table below organizes the responses.
Satisfied with Service Not Satisfied with Service Total
Made a Purchase 130 494 624
Did Not Make a Purchase 715 183 898
Total 845 677 1522

a. What is the probability that a shopper selected at random made a purchase, given that they were not satisfied with the service? need your answer as a fraction.

b. What is the probability that a shopper selected at random made a purchase or was satisfied with the service they received? need your answer as a fraction

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