An investment will pay $$300$ at the end of each of the next $3$ years, $$150$ at the end of Year $4,$$$500$ at the end of Year $5,$$$700$ at the end of Year $6,$ and $$400$ at the end of Year $7.$ If other investments of equal risk earn $6\mathrm{.}75\%$ annually, what is the present value of the cash flow stream? Using the same information, what is the future value of the cash flow stream?