which three statements are true?
1. f1 == f2
2. f1 == f3
3. f2 == f1[1]
4. x == f1[0]
f == f1[0]
(2) is correct because the reference variables f1 and f3 refer to the same array object.
(4) is correct because it is legal to compare integer and floating-point types.
(5) is correct because it is legal to compare a variable with an array element.
(3) is incorrect because f2 is an array object and f1[1] is an array element.
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