The bottom right corner. The last corner.
This is what I did. I'm sure there are other methods out there. Please share if you have a better idea.
Print or trace the block diagram onto paper. It's 8" x 8" if you were wondering.
Cut a piece of background fabric large enough for the block plus seam allowances.
Trace the positions of the star and lemons, as well as the seam lines onto the fabric using a disappearing or washable marker. I have a wonderful little light table which I can't live without but a bright window will work as well.
Connect the corners as below, cut out, and number.
Trim the seam allowances where the sections will be attached to 1/4". Leave the outer seam allowances larger. This will make it easier to secure in the next steps.
Baste through all layers. Do not baste too close to the star. You want to be able to turn the seam allowances under.
If you want a little more detail on reverse applique, have a look at block B-1.
Applique the melons onto the block.
Cut out the block 1/4" outside the marked seam lines.