QUESTION $6$ A causal, discrete$-$time, filter at rest is given by its difference equation as follows y$[$n$]-$ x$[$n$]+$ x$[$n$-1]-0\mathrm{.}6$y$[$n $1]$ This is a FIR filter OThis is an IIR filter This is a stable BIBO filter OThis is not a stable BIBO filter The system has a zero at z$-1$ The system has a zero at z $1$ The system has a pole at z$-0\mathrm{.}6$ The system has a pole at z$-0\mathrm{.}6$ Ob$,$ c$,$ e$,$ h are all true b$,$ c$,$ e$,$ g are all true