$8\mathrm{.}8-2($Investment decision problem$)$ The Heinlein and Krampf Brokerage firm has just been instructed by one of its clients to invest $$250,000$ of her money obtained recently through the sale of land holdings in Ohio. The client has a good deal of trust in the investment house, but she also has her own ideas about the distribution of the funds being invested. In particular, she requests that the firm select whatever stocks and bonds they believe are well rated but within the following guidelines: