The Thomas Supply Company Incorporated is a distributor of gas-powered generators. As with any business, the length of time customers take to pay their invoices is important. Listed below, arranged from smallest to largest, is the time, in days, for a sample of the Thomas Supply Company Incorporated invoices. 13 13 13 20 26 27 28 32 34 34 35 35 41 41 41 42 44 45 47 48 50 52 55 56 Click here for the Excel Data File (Round your answers to 2 decimal places.) a. Determine the first and third quartiles. First quartile 31.75 Third quartile 48.75 b. Determine the second decile and the eighth decile. Second decile Eighth decile 28.00 52.60