Chemistry - Partial Pressure?

An apparatus consists of a 4L flask containing nitrogen gas at 27 degrees Celcius and 875kPa joined by a valve to a 13L flask containing argon gas at 27degrees Celcius and 54.9kPa. The valve is opened and the gases mix. what is the partial pressure of nitrogen after mixing, argon after mixing, and total pressure of the gas mixture? Answer in units of kPa.