We would like to know ...... but that is beyond our reach at this point.
It seems that the solution of Problem 1 is still out of reach.
[see also: achieve, attain, arrive at]
The point $A$ can be reached from $B$ by moving along an edge of $G$.
For example, $F$ reaches a relative maximum of 5.2 at about $x=2.1$.
The iterates eventually reach the value 1.
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