Air in the amount of 1 lbm is contained in a well-insulated, rigid vessel equipped with a...

Air in the amount of 1 lbm is contained in a well-insulated, rigid vessel equipped with a stirring paddle wheel. The initial state of this air is 30 psia and 40°F. How much work, in Btu, must be transferred to the air with the paddle wheel to raise the air pressure to 50 psia? Also, what is the final temperature of air?