Problem 2.4 Find and sketch the Fourier transforms for the following signals. (a) u(t) = (1 – |r|)4-1,1|(). (b) v(t) = sinc(21)sinc(4r). (c) s(t) = v(t) cos(2007 t). (d) Classify each of the signals in (a)–(c) as baseband or passband.

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Consider the circuit shown below. R1 = 100 N R2 = 100 N C1 10 mF V = 12 V R3 3 100 N C, = 4.7 mF %3D %3D a. After the switch has been closed for a very long time, what are the voltages across the capacitors C1 and C2? Hint for (a) Voltage across C1 is V, and voltage across C2 is V. b. After the switch has been closed for a very long time, what is the energy stored in each capacitor? Hint for (b) Energy stored on C, is J, and energy stored on C, is J.

R148 R149 R150 If R148 is 18 Ohms, R149 is 13 Ohms, R150 is 25 Ohms, and there is 4 Amps flowing through R150, what is the current through R148? Please show 3 decimal places and don't include units in your answer (i.e. don't include A in your answer).