Made in 1945.
It was made by Colt in 1944.
about 1941
It was made by Remington Rand in 1943
made about 1943 by Remington Rand
7790314 is not a serial number, it is the part number for the slide.
You will have to call Colt and request a letter.
Made about 1904.
You can find a list of Colt M1911 and M1911A1 production serial numbers at http://www.coolgunsite.com/pistols/colt%20production.htm. Going by the numbers in your question (7071), it looks like you have a M1911 that was made for the Navy in 1912, the first year of production.
Made in 1905.
If you mean the 1911 government model, it was made in 1912
Impossible to answer without a serial number.
1923