Please show all work. All I want to know is the surface area of this heat exchanger with and without fins

Dimensions of Radiator For the purpose of this project, we are going to assume that the dimensions of the radiator in pictures above of those listed in the figure below. We are also going to assume that the internal fluid makes 5 passes before exiting the radiator. Flat Tubes 120 mm Height (H) 1 mm 274 mm Length (L) Helical Fins 10 mm 25 mm Width (W) Dimensions of Radiator For the purpose of this project, we are going to assume that the dimensions of the radiator in pictures above of those listed in the figure below. We are also going to assume that the internal fluid makes 5 passes before exiting the radiator. Flat Tubes 120 mm Height (H) 1 mm 274 mm Length (L) Helical Fins 10 mm 25 mm Width (W)