Janet made trays with 8 squares in a rectangle. 6 clear and 2 red. they are numbered 1 -8 top row is 1-4 and bottom is 5-8. She made code names for it for example if 2 and 8 were red, it was 2:8 and if u rotate it 180 degrees it is 1:7 which is the same. 4:6 however isnt the same coz it is not a rotation but only a flip.
a. There are 12 designs: 2:6, 1:8, 1:4, 1:3, 2:7,4:5,1:7,1:5,1:6,2:4,1:2 and 3:6. There are 4 more designs. What are they.

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