A straight fin fabricated from 2024 aluminum alloy (k = 185 W/m ∙ K) has a base thickness of t = 3 mm and a length of L = 15 mm. Its base temperature is Tb = 100°C, and it is exposed to a fluid for which T∞ = 20°C and h = 50 W/m2 ∙ K. For the foregoing conditions and a fin of unit width, compare the fin heat rate, efficiency, and volume for rectangular, triangular, and parabolic profiles.