Find the thermal resistance (R) values of the following materials:
a. 200 mm thick lightweight concrete block
b. 9 mm thick plywood
c. 89 mm thick softwood lumber
d. 25 mm thick fiberglass insulation board
e. 16 mm thick gypsum wallboard
f. Asphalt shingles (3 mm thick)
g. 300 mm thick cellulose insulation blown into an attic space