A mid-tier accounting "rm conducted a survey to determine the amount of time its graduate accountants spent studying for the CA (Chartered Accountants) program each week. By asking 38 new graduate accountants, the average time spent studying was 5.75 hours per week. Based on many studies conducted by the Queensland Accounting Society, it could be assumed that the standard deviation was 147.2 minutes. Construct a 90% con"dence interval for the average amount of time accountants spend studying their CA at the "rm. Report the lower limit (in hours) correct to 2 decimal places.