Model a dog's tongue as a wide and flat fin (5 cm wide, 15 cm long and 5 mm thick) with thermal conductivity 0.5 W/mK. Estimate the fin efficiency and fin effectiveness of a dog's tongue under the two different situations:

a. When the dog is not panting (natural convection, ħ= 10 W/m^2K)
b. When the dog is panting (forced convection, ħ=150 W/m^2K).