When air is inhaled, its volume remains constant and its pressure increases as it is warmed to body temperature T_body = 37 ^◦C. Assuming that air behaves as an ideal gas and that it is initially at a pressure of 1 atm, what is the pressure of air in the lungs after inhalation if the air is initially (a) at room temperature, T = 20 ^◦C; (b) at the temperature of a cold winter day in Boston, T = −15 ^◦C; (c) coming from one person’s mouth to another’s during cardiopulmonary resuscitation (CPR). For CPR, assume the air is initially at body temperature and at p = 1 atm.