...$1 they are all in common circulation and not struck in any precious metals.
In order to give any sort of estimate of your coin's value the date and mint mark is required.
Date, Mint mark and Motto
The mint mark position was moved to the coins' edge beginning in 2009, similar to the edge lettering on Presidential dollars.
Current value is $1.75
No numismatic value. A dollar for each coin maybe
About $150.
42cents
About $27.
"DO" isn't a mint mark. The mint mark on a silver dollar for that year is on the reverse (tails) side, just above the letters "do" in the word "dollar."
Melt? $5.80. Depending on mint mark and condition it might be worth more.
mint mark is to the left of the value on the reverse.
Face value unless it has the mint mark "S".