Consider the following uneven cash flow stream:

Year $0$: $$0$

Year $1$: $$250$

Year $2$: $$400$

Year $3$: $$500$

Year $4$: $$600$

Year $5$: $$600$

a$.$ What is the present value if the discount rate is $10$ percent?

b$.$ Add a cash outflow $($or cost$)$ of $$1,000$ at Year $0.$ What is the present value $($or net present value$)$ of the total cash flow stream now?