How would you use a multimeter as a logic probe to check the logic states of points in this circuit, in order to troubleshoot it? (2) Suppose you checked the logic states of pin #1 on the IC, for both states of the switch (pressed and unpressed), and found that pin #1 was always "high". How does this measurement indicate the student's design flaw in this circuit? How would you recommend this design flaw be corrected?