Assume a square-shaped distribution substation service area and that it is served by four three-phase 12.47 kV wye-grounded feeders. Feeder mains are of 2/0 copper conductors are made up of three-phase open-wire overhead lines having a geometric mean spacing of 37 in. between phase conductors. The percent voltage drop of the feeder is given as 0.0005 per kVA-mile. If the uniformly distributed load has a 4 MVA per square mile load density and a lagging-load factor of 0.9, and conductor ampacity is 360 A, find the following: (a) Maximum load per feeder (b) Substation size (c) Substation spacing, both ways (d) Total percent voltage drop from the feed point to the end of the main