I am assuming that "the nearest chair" means the shortest accessible distance, not a direct line; that the shelves do not face both sides of a given aisle, and that "at least four" means "the fifth shelf or further from the center aisle." Also, I am assuming that the "center aisle" is the one with apparent north-south orientation, not the one with east-west orientation, and that Charlie is not color-blind.
With those choices for any variables, Charlie should look at the shelves equivalent to 151 through 156 on the diagram. The window should be visible from there, and the red chair on the left is quite close.
If shelves line both sides of an aisle, he could also look at any shelves between 1 and 6 which are facing 151 through 156. Also, 115 through 120 and any shelves which might be facing them are possibilities, assuming that the clues allude to accessible paths and not merely the chairs which would be closest if there were no shelves in the way. The fourth unit of shelves in any series of possibilities can be included in the solution if necessary (i.e. 151-157).
[block handwriting, not disguised]
With those choices for any variables, Charlie should look at the shelves equivalent to 151 through 156 on the diagram. The window should be visible from there, and the red chair on the left is quite close.
If shelves line both sides of an aisle, he could also look at any shelves between 1 and 6 which are facing 151 through 156. Also, 115 through 120 and any shelves which might be facing them are possibilities, assuming that the clues allude to accessible paths and not merely the chairs which would be closest if there were no shelves in the way. The fourth unit of shelves in any series of possibilities can be included in the solution if necessary (i.e. 151-157).
There is some other purpose to this puzzle?
[Not signed.]