set Investments := Stocks Bonds;
param b := 10000;
param G := 15000;
param q := 0.05;
param r := 0.10;

param Return := 
  0 Stocks 1.25
  0 Bonds  1.05
  1 Stocks 1.10
  1 Bonds  1.05
  2 Stocks 1.00 
  2 Bonds  1.06
  3 Stocks 0.95
  3 Bonds  1.08 ;