Following observations were made during a trail on four-stroke diesel engine. Cylinder diameter \(=250 \mathrm{~mm}\), stroke \(=400 \mathrm{~mm}\), speed \(=250 \mathrm{rpm}\) brake load \(=70 \mathrm{~kg}\), brake drum diameter \(=2 \mathrm{~m}\). m.e.p. \(=6\) bar, diesel oil consumption \(=0.1\) \(\mathrm{m}^{3} / \mathrm{min}\)., specific gravity of fuel \(=0.78, \mathrm{C}. \mathrm{V} .=\) 43,900 kJ/kg. Determine: (i) IP, (ii) BP, (iii) FP, (iv) Mechanical efficiency, (v) brake thermal efficiency, and (vi) indicated thermal efficiency.