The function
f
has the following features:
  • f
    ′
    (
    x
    )
    0
    on
    (
    ∞
    ,
    2
    )
  • f
    ′
    (
    x
    )
    0
    on
    (
    2
    ,
    1
    )
    and
    (
    1
    ,
    ∞
    )
  • f
    ′′
    (
    x
    )
    0
    on
    (
    ∞
    ,
    1
    )
    and
    (
    1
    ,
    ∞
    )
  • f
    ′′
    (
    x
    )
    0
    on
    (
    1
    ,
    1
    )
Which of the following could be the graph of
f
?
ref_doc_title.

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