Referring to the diagram, Q1 = 6.00uC, Q2 = -6.00uc, Q3 = 6.00uC, y = 2.00cm and x = 7.00cm. What is the magnitude of the electric field at Q2, due to Q1 and Q3?

PLEASE HELP ME!!

Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)