Questions on "Engines [Gas Turbines]"

[truefaith]

Can somebody kindly help me?

Q1. The reason for the reduction in thrust setting with increase ub altitude is:
(a) increase in TAS for samw as IAS
(b) decrease in ambient temperature causing greater temperature difference in the process
(c) increase in EAS for same IAS

Q2. For a given engine RPM and gas temperature at sea level and ISA conditions:
(a) fuel delivery from the burners is smallest
(b) fuel delivery is not affected by altitude
(c) fuel delivery from the burners is greatest

Q3. Taking air from compressor for pressurisation and engine deicing will result in:
(a) high EGT and high specific fuel consumption
(b) low EGT and low specific fuel consumption
(c) high EGT and low specific fuel consumption

Q4. Engine running at constant RPM for a free turbine engine the RPM:
(a) cannot be increased
(b) maybe increased by increased torque pressure
(c) can be increased by propellers