The Thomas Supply Company, Inc. is a distributor of small electrical motors. As with any business, the length of time customers take to pay their invoices is important. Listed below, . arranged from...

The Thomas Supply Company, Inc. is a distributor of small electrical motors. 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, Inc. invoices.

a. Determine the first and third quartiles.

b. Determine the second decile and the eighth decile.

c. Determine the 67th percentile.