you just open the first screen and then change the view to 50%.

expand the field by dragging the right box far to the right.

then right click on each of the other files and open in paint.

after it opens, cntl+a, ctrl+c

go to the one at 50% and ctrl+v

click on it and drag it to the right and match the edges.

do the same for each of the other 2 pictures and then save the file as a jpg.

thats all.