Final answer:
The question seeks the calculation of the Brayton cycle efficiency with given isentropic efficiencies for the compressor and turbine and specific temperature and pressure conditions. Without a formula or additional data, we cannot provide a numerical answer.
Step-by-step explanation:
The question asks about calculating the efficiency of a power generation cycle known as the Brayton cycle, using given parameters for the compressor and turbine efficiencies, as well as the temperatures and pressures at different stages of the cycle.
To find the actual cycle efficiency, we would use the isentropic efficiency relationships for both the compressor and the turbine and apply the first law of thermodynamics to the cycle.
However, without the specific formula or additional data related to heat added and work done in the cycle, an exact numerical answer cannot be provided.