A petrol engine with a stroke length of \(200 \mathrm{~mm}\) and diameter of \(150 \mathrm{~mm}\) has a clearance volume of \(5 \times 10^{3} \mathrm{~mm}^{3}\). The indicated thermal efficiency of the engine is \(30 \%\). Find the relative efficiency of this engine. If the mean effective pressure is 5 bar and the engine speed is 1000 RPM. Find indicated power of the engine. Take \(\gamma=1.4\) for air. Assume four stroke single cylinder engine.