Consider a system where total of the $5$ th$,10$th$,15$ th and $20$ th most recent input values is given as output $($You should obtain values in every $5$ cycles$).$ Design the circuit.

$\backslash$table$[[$Input:$,5,35,935,693556935,456935],[$Output:$,0,,0,\backslash$table$[[0,5]],5],[$Input:$,11,569,35,9113456935,8911345693],[\backslash$table$[[$Output:$],[$Input:$]],5,,,5,8+5=13$