Q. 1. One of four mutually exclusive alternatives below must be selected. First cost & BTCF (Before Tax Cash Flow) values of the alternatives are given in the table below. Equal life of the alternatives is 10 years but the value of the investment (first cost) will not diminish with time. (6) Alternative First Cost Annual BTCF ROR on Incremental Investment 0 A B 2,000 -100 3,000 150 4,000 320 5,000 450 A B D i. Find the value of ROR (Rate of Return) on incremental investment and fill the table. ii. Draw the network diagram and find out which alternative is suitable for which range. iii. If the zero alternative 0 is added how would you respond to part (1) 2) A 400/200-V, 1-phase transformer is supplying a load of 25 A at a p.f. of 0.866 lagging. On no-load the current and power factor are 2 A and 0.208 respectively. Calculate the current taken from the supply