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

Captain America will receive $200,000 per year starting on his 35th birthday and ending on his 60th birthday (his last payment will be on his 60th birthday). He then will receive $400,000 every six months starting six months after the last payment of $200,000 and ending on his 89th birthday. He will also receive $16,000,000 on his 90th birthday and another $16,000,000 on his 95th birthday. 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