SOLVE MANUALLY $(14$ points$)$ Assume that you are the address administrator at an ISP. You have a $128\mathrm{.}20\mathrm{.}224\mathrm{.}0/20$ address block.

You have two customers, A and B$,$ with $1000$ hosts each; two customers, C and D$,$ with $500$ hosts each; and

three customers, E$,$ F$,$ and G$,$ with $250$ hosts each.

a$.(10$ points$)$ Your task is to identify non$-$overlapping address blocks that will provide each customer with

enough IP addresses to assign a unique address to each of their hosts. Use notation similar to

$128\mathrm{.}20\mathrm{.}224\mathrm{.}0/20$ to show the address block for each customer. Show your work.

Note: $20D=14H,128D=80H,224D=E0.$Assume that you are the address administrator at an ISP. You have a $128\mathrm{.}20\mathrm{.}224\mathrm{.}0/20$ address block. You have two customers, A and B$,$ with $1000$ hosts each; two customers, C and D$,$ with $500$ hosts each; and three customers, E$,$ F$,$ and G$,$ with $250$ hosts each. a$.$ Your task is to identify non$-$overlapping address blocks that will provide each customer with enough IP addresses to assign a unique address to each of their hosts. Use notation similar to $128\mathrm{.}20\mathrm{.}224\mathrm{.}0/20$ to show the address block for each customer. Show your work. Note: $20$ D$=14$ H$,128$ D$=80$ H$,224$ D$=$E $0.$