Please answer 26 & 28. Thanks!

24. The NAND and the negative-OR symbols represent equivalent operations, but they are func. tionally different. For the NOR symbol, look for at least one HIGH on the inputs to give a LOW on the output. For the negative-AND, look for two LOWs on the inputs to give a HIGH output. Using these two functional points of view, show that both gates in Figure 3-88 will produce the same output for the given inputs. FIGURE 3-8 Section 3-6 The Exclusive-OR and Exclusive-NOR Gates 25. How does an exclusive-OR gate differ from an OR gate in its logical operation? 26. Repeat Problem 17 for an exclusive-OR gate. 27. Repeat Problem 17 for an exclusive-NOR gate. 28. Determine the output of an exclusive-OR gate for the inputs shown in Figure 3-79 and draw timing diagram. 15. Draw the rectangular outline symbol for a 4-input OR gate. 16. Show the truth table for a 3 -input OR gate. Section 3-4 The NAND Gate 17. For the set of input waveforms in Figure 3-83, determine the output for the gate shown and draw the timing diagram. FIGURE 3-83 18. Determine the gate output for the input waveforms in Figure 3-84 and draw the timing 4. Draw the rectangular outline symbol for a 5. Determine the output, X, for a 2 -input AND gate with the input waveforms shown in Figure 378. Show the proper relationship of output to inputs with a timing diagram. FIGURE 3-78 6. Repeat Problem 5 for the waveforms in Figure 379. FIGURE 3-79 7. The input waveforms applied to a 3-input AND gate are as indicated in Figure 3-80. Show the output waveform in proper relation to the inputs with a timing diagram