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I saw this three star problem in Hirsch ..

If we have open sets $U \subset R^3$ ,$V \subset R^2$ and $f:U \to V$ is $C^1$ and onto...Prove there is at least one point in $U$ where $f$ has full rank

I want to know the following things

$1)$Is this problem still open?(As three stars problems in Hirsch are supposed to be open)

$2)$If so what relevant progress has been made?

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