Airstream at 1 atm flows, with a velocity of 15 m/s, in parallel over a 3-m-long flat plate where there is an unheated starting length of 1 m. The airstream has a temperature of 20°C and the heated section of the flat plate is maintained at a constant temperature of 80°C. Determine

(a) The local convection heat transfer coefficient at the trailing edge

(b) The average convection heat transfer coefficient for the heated section.