8421
Here is why 8421 is correct.
Start with this:
One number is "right" and well placed 1
6507 nothing is correct, so in 1937, 7 is incorrect, 1 is correct as before, which leaves 93 as candidates
8524, 5 would be incorrect leaving 824 as candidates
9285 = 5 incorrect 8 is correct but wrong place
leaving 24
8421
Thank you, correct so 3841, how about another, like solve for X where X is a person responsible for all this chaos, and Y is why did they do it, and Z is the plan.