Consider the exponential average formula used to predict the length of the next CPU burst $(15$ points$).$

${}_{n+1}=*t_n+(1-){}_n$

Assume that the actual CPU burst time for $5$ jobs that are submitted to CPU are as follows:

a$.$ Please calculated the estimated Length of Next CPU Burst time when $=0\mathrm{.}5$ and ${}_0=4$ milliseconds

b$.$ Please calculated the estimated Length of Next CPU Burst time when $=1$ and ${}_0=6$ milliseconds