(Solved): In an unmixed flow three-shaft turbofan engine, the fan is driven by the low-pressure turbine. press ...

In an unmixed flow three-shaft turbofan engine, the fan is driven by the low-pressure turbine.
pressure compressor by medium pressure turbine, high pressure compressor by high pressure turbine
is translated by Separate nozzles are used for cold air and burnt gases.
There is no pressure loss in the cold air nozzle. 8% (b=0.08) cooling from the high pressure compressor
air is used in medium and high pressure turbines.

Ta=288.15K Pa=101.325kPa Mach number M=0.2 By-pass ratio ?=5.05
Core airflow (ma ? ) 100 kg/sn
Fan compression ratio 1.45
Medium Pressure Compressor compression ratio 5.8
High Pressure Compressor compression ratio 4.2
Turbine inlet temperature 1543K
Isentropic yields;
Diffuser 0.88
Fan 0.9
0.89 for compressors
0.93 for turbines
Exhaust nozzles efficiency 0.98
Combustion efficiency 0.98
Fan ABT shaft mechanical efficiency 0.84
Other shaft mechanical efficiencies 0.99
Combustion chamber pressure loss 3% relative to inlet pressure
Fuel calorific value 45,000kJ/kg

According to the data above
a) thrust force
b) Find the TSFC.
Note: Take ?=1.4, Cpc=1.005 kJ/kgK for air and ?=1.333 and Cph=1.148kJ/kgK for burnt gas.