A$.$ How much would the return on stock B have to

be in order for the optimal solution to invest fully

in that stock? B$.$ How much would the return on stock C have to

increase in order to invest fully in that stock? C$.$ Explain the value of the shadow price for the total investment constraint. If the student could borrow $$1,000$ at $8\%$ a year to increase her total

what would you recommend and why $?$

why?