5. Unchecked; zero; not present
6. Checked; one; present
7. When you switch 3 and 2, the answers to #5 and 6 switch
9. 38 to 5000
11. 1718
12. 1655
14. By switching the red and black wires
15. The electromagnet turns the reed switch on
16. Normally closed
18. Light shining = closed photoresistor
19. More light = more resistance
20. Reverse program
21. Having the phototransistor normal will make it utilized
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