A frequency$-$selective filter is described by the following input$-$output difference equation y$($n$)+0\mathrm{.}99$y$($n $1)=$ x$($n$)$ x$($n $1).1)(3$ points$)$ Find the frequency response H$($$).2)(2$ points$)$ Determine which type of this filter is$,$ among lowpass, highpass and bandpass filters, and explain why.