Need R Program for this questions

Consider the model of the form 14 = 5x + 21, where w, is Gaussian white noise with 0 = 1. 1 = x + w for t = 1 200, where t = 1,...,100 fo. 100:1px --.00 ) cas(2=t/4), t = 101,...,200 8.1 Simulate and plot n = 200 observations. 8.2 Compute and plot the mean function wz(t), for t = 1....200. 8.3 Calculate the autocovariance functions, (s, t), fors, t = 1,...,200 Consider the model of the form 14 = 5x + 21, where w, is Gaussian white noise with 0 = 1. 1 = x + w for t = 1 200, where t = 1,...,100 fo. 100:1px --.00 ) cas(2=t/4), t = 101,...,200 8.1 Simulate and plot n = 200 observations. 8.2 Compute and plot the mean function wz(t), for t = 1....200. 8.3 Calculate the autocovariance functions, (s, t), fors, t = 1,...,200