please answer this question sir /mam thank you

= 6. An aluminum fin of length 8 cm and thickness 0.25 cm (kfin = 210 W/mC) protrudes from a wall maintained at 350C. The ambient temperature is 30C and local coeffient of heat transfer from the air to fin is 15 W/m2C. Calculate the heat loss from the fin per unit depth of the material. (hint: assume width of fin to be Z)