Need answer asap.

2) An aircraft emergency locator transmitter (ELT) is a device designed to transmit a signal in the case of a crash. Company A makes 80% of the ELTs, company B makes 15% of them, and Company C makes the other 5%. The ELTs made by A have a 4% rate of defects, the ELTs made by B have a 6% rate of defects, and the ELTs made by C have a 9% rate of defects. (a) If an ELT is selected at random from the population of all ELTs, what is the probability that it is defective? (4 marks) (b) If an ELT selected at random is found to be defective, what is the probability that it was manufactured by (i) Company A? marks) (ii) Company B? marks) (iii) Company C? marks) be a continuous random variable with probability density function (pdf)