A recent study of the hourly wages of maintenance crew members for the major airlines showed that the average wage was $20.50 per hour with a standard deviation of $3.50. Assume the distribution of hourly wages follows a normal probability distribution. If you wish to be an airline that pays its maintenance crew members in the top 10% of hourly wages, what is the minimum hourly wage you will need to pay? Show your answer to two decimal places (for example, 15.73)