A copper pipe with an outer radius of 0.011 m runs from an outdoor wall faucet into the interior of a house. The temperature of the faucet is 4.2° C and the temperature of the pipe, at 3.2 m from the faucet, is 23° C. In fourteenminutes, the pipe conducts a total of 251 J of heat to the outdoor faucet from the house interior. Find the inner radius of the pipe. Ignore any water inside the pipe. Step by step please and thanks!