In order to find the volume in this question we will use the Ideal Gas law, which is:
PV = nRT
where:
P = pressure in atm
V = volume in Liters
n = number of moles
R = constant
T = temperature in kelvin
1.05 atm * V = 4 * 0.082 * 303
1.05V = 99.38
V = 94.64 Liters