Determining the order of calling close() methods in a try-with-resources block

Given an announcement of three resources R1, R2, and R3. It is required to explain the following:

• In what order will the close() calls be executed for the specified resources?
• When exactly does the closing process start: before exiting the try block or after?
• How will the mechanism behave if one of the close() methods throws an exception?

try (R1 r1 = ...; R2 r2 = ...; R3 r3 = ...) {
    ...
}