Shipping company ips has shipping rates that are a function of the weight of the parcel. for packages weighing less than or equal to 7 pounds, they charge $0.75 per pound. for packages weighing between 7 and 17 pounds, they charge $2.25 per pound. if packages weigh 17 pounds or more, they charge $3.25 per pound. ips refuses to ship any parcel weighing more than 67 pounds. there is also a flat fee of $1 for all deliveries and an additional fee of $6 for all deliveries weighing 17 pounds or more.

complete the following description of a piecewise function so that is describes the shipping costs

how does it cost to ship a package weighing 21 pounds with ips? $