Calculate the R-Value of a wall made up of the following. - 0.5" Wood siding (R = 0.81, fta-hr-F/BTU, per 1/2") 3.2" Plywood siding (R = 0.62, fta-hr-F/BTU, per 1/2") 3.3" Expanded Polystyrene board (R = 4.0, ft2-hr-F/BTU, per 1") 0.5" Plaster board (R = 0.45, fta-hr-F/BTU, per 1/2") State your answer in fta-hr-F/BTU and round to 2 decimal places