Q$3$: In figure below shows a system having four synchronous generators each rated $11\mathrm{.}2kV,60$MVA and each having a sub transient reactance of $16\%.$ Find $($a$)$ fault level for a fault on one of the feeders $($near the bus with $x=0).($b$)$ The reactance of the current limiting reactor $x_R$ to limit the fault level to $860$ MVA For a fault on one of the feeders near the bus.