Seems to me that Rakesh has suddenly been invented (see date joined) most likely by j___p to keep the deminishing conversation going and reminisce of the good old days in the retirement village. So o.k. Rakesh check these vidoes out for a clearer explanation, but if you can't understand the theory behind them just ask J Player as he knows all the formuls.
http://www.youtube.com/watch?v=oY1eyLEo8_A
http://www.youtube.com/watch?v=eqjl-qRy71w
http://www.youtube.com/user/only1egg?blend=3&ob=0#p/u/0/3QTzxah6fOI
rgds