1
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.
2
[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.