Consider a nonlinear combination generator where we have a degree$-$n LFSR but the output at each time step is not s$0,$ but instead g$($s$0,...,$ sn$1)$ for some nonlinear function g$.$ Assume the feedback coefficients of the LFSR are known, but its initial state is not. Show that each of the following choices of g does not yield a good stream cipher. $($a$)$ g$($s$0,...,$ sn$1)=$ s$0$ s$1.($b$)$ g$($s$0,...,$ sn$1)=($s$0$ s$1)$ s$2$