Probability Stats question

Question

Suppose that company A and company B manufacture and supply equivalent
parts to a customer. Among parts from company A, 5% are defective; among company B,
7% are defective. Suppose that a randomly selected part turns out defective. If company
A supplies 4 times as many parts as company B, what is the probability that this part was
made by company A?

Answer 1

they supply equal parts, more likely it's from B

A supplies 4 times B, then more likely it's from A