A money market manager must decide on the mix of investments to produce the maximum return on the total investment of $250K. The money can be put in either stock fund that gives a return of 9% and/or a bond fund that gives a return of 8%. In order to manage risk, not more than 40% of the total investment can be put in the stock fund and also at least 50% of the total investment. formulate the problem as an LP problem solve it using the solver. what will be the impact on the solution if he has $10k additional money to invest?