Two workers assemble hand piece devices from a production process. The probability that worker A makes a mistake in assembling a hand piece device is .08 and the probability that worker B makes a mistake is .07 However, worker A assembles 75% of the hand piece devices while worker B assembles the remaining 25%. If an assembled hand piece is randomly selected from all of those produced during a given time and it is determined to be acceptable, what is the probability that worker A assembled this hand piece device