Gas laws

Feb 2020
Hey guys
I have a question I'm struggling with...
A 6.000L flask of nitrogen gas at 200.0 kPa is connected by a stopcock to a second flask containing 3.000L of argon gas at 350.0 kPa. Assuming the volume of the stop clock is negligible and the temperature remains constant, what is (a) the partial pressure of each gas when the stop cock is opened and (b) the total pressure when the stop cock is opened?
I'm not quite sure how to start...