Face fill problem

Hi, I can’t get blender to automatically fill faces ever. here is a screen of some quads i’m trying to fill and if i select all the verts and press f or the beauty fill option it doesn’t do anything. pls help.
bannana.blend (386 KB)

Join the two far right vertices with an edge and then use Alt+F (fill faces) and then Alt+J (tris to quads) or preferably delete the existing faces and install the ‘Loop tools’ addon from the user preferences / addons panel and bridge the two lines of vertices.