I have noticed that there was a typo error in my last equations, which must
be obvious to everybody, but still I would like to correct it. the equations
read as:
>5(1+r) = 12x (1)
>7(1+r) = 12y (2)
It should obviously read as:
5(1+r) = 12Px (1)
7(1+r) = 12Py (2)
This gives us: Px = 5/7 Py
Sorry for any inconvenience. Cheers, ajit sinha