Oscilloscope channel addition problem. read the followingoscilloscope settings carefully. suppose you display a 1 khz, 2 vsine wave in channel a and a dc, 1v signal in channel b withsensitivities set on 1v/div. you select 'add' so that the twosignals are combined and you readjust the position so the trace isin the middle of the screen. if you switch the signal in channel bfrom dc to ac, what will happen? (draw a picture if it .)a. the trace jumps down 2 divisions. b.the trace jumps down 1 divisionc. the trace jumps up 1 division. d.nothing happens