This circuit is hard to analyse mathematically. However, MultisimLive allows us to see its frequency response.

i$.$Provide an image from MultisimLive showing your version of Figure $6.$ In MultisimLive, perform an AC Sweep and include an image of the grapher output showing input amplitude variation and output amplitude variation with frequency over the default frequency range. Do not include phase. Include coordinates showing gain at $10$ kHz$.$

ii$.$Discuss your graphs in $($c$)($i$)$ above. In particular, explain the low$-$frequency gain and the location of the cut$-$off point in the new arrangement. Include diagrams or graphs if they help.

d$.$Modify your MultisimLive circuit to include an op$-$amp acting as a unity$-$gain buffer between the filter and the load R$2.$ Block $1$ pp$.48$ and $49$ shows examples of buffer amplifiers used in this way. In your MultisimLive circuit use the $3-$terminal op$-$amp as it does not require you to provide a power supply or additional components. Provide images from MultisimLive showing your circuit and the graph from an AC Sweep. For the AC Sweep, use the default frequency range and, in the graph, show magnitudes only; do not include phases. Show that the inclusion of the buffer has restored the behaviour to that expected of the unloaded filter. You should notice, however, that the op$-$amp introduces an additional roll$-$off.