parallel operation of generators

two alternators running in parallel supply the following load. 1500kW @ pf of 0.9 lagging, 800kW @ unity power factor, 1000kW @ 0.8 pf lagging, and 600kW @ 0.8 pf leading. The load on one machine is adjusted to 2000kW @ 0.95 lagging. Find the load in kW and pf of other machine.