Consider the the number of lambs slaughtered in Queensland, available in the aus$\_$livestock dataset. $($a$)$ Use the ETS$()$ function to estimate the equivalent model for simple exponential smoothing, and generate forecast for the next month. $($b$)$ Fit this dataset into time series regression model amd choose the best model $($No trend, Linear, Quadratic$).$ Present your answer in R code and the output