Refer to figure 3-28 in answering Q36 through Q38.

Figure 3-28. - Circuit for Q36 through Q38.

Q.36 What type of circuit is figure 3-28?
Q.37 If: E1 = +5VAnd: E2 = +11VThen E_out = ?
Q.38 What is the difference in potential between the inverting (-) and noninverting (+) inputs to the operational amplifier when:E1 = +2VandE2 = +4V