Just need help with this part, please (originally was 3 parts, this is only 1 part that I need help on).

Black Widow is offered an investment that will pay her $120,000 every six months starting on her 35th birthday and ending six months before her 65th birthday. She then will receive $300,000 every other year for ten years (5 payments) with the first of these coming six months after her last payment of $120,000. Black Widow would also receive $1,000,000 one year after her last payment of $300,000. Assuming each is celebrating their 28th birthday today and they have a 7% (semi-annual) opportunity cost, which of them has the best offer? SHOW ALL WORK as presented in lectures and solutions. Make your decision using the present value concept. Black Widow is offered an investment that will pay her $120,000 every six months starting on her 35th birthday and ending six months before her 65th birthday. She then will receive $300,000 every other year for ten years (5 payments) with the first of these coming six months after her last payment of $120,000. Black Widow would also receive $1,000,000 one year after her last payment of $300,000. Assuming each is celebrating their 28th birthday today and they have a 7% (semi-annual) opportunity cost, which of them has the best offer? SHOW ALL WORK as presented in lectures and solutions. Make your decision using the present value concept