Consider the inventory example presented in Sec. $16\mathrm{.}1$ except$$that demand now has the following probability distribution:$$P$\{$D $0\}14,$ P$\{$D $2\}14,$P$\{$D $1\}12,$ P$\{$D $3\}0.$The ordering policy now is changed to ordering just $2$ cameras at$$the end of the week if none are in stock. As before, no order is placed$$if there are any cameras in stock. Assume that there is one camera$$in stock at the time $($the end of a week$)$ the policy is instituted.$($a$)$ Construct the $($one$-$step$)$ transition matrix.