1. ( (30pts)A1m2 copper wall is needed to be cooled using n number of rectangular fins that are made up of copper having a width of 2cm, a length of 15cm and a thickness of 2.5mm. The tips of the fins are insulated. The copper wall is at 300C and the ambient temperature is 25C. If the heat transfer coefficient between the fins and the surrounding air is h=25W/m2K, find the required number of fins (n) to dissipate the quarter (1/4th) of the heat. Data: kcu ayg =378W/m,K