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Problem$4$ : The VHDL Program shown below has been written for a specific sequential circui a$/$ identify the circuit b$/$ explain the task performed by the circuit. Be very specific.

LIBRARY ieee ;

USE ieee,std logic $1164.$all ;

ENTITY SEQ IS

GENERIC $($ N : INTEGER :$\_4)$;

PORT $($ R : IN STD LOGIC VECTOR$($N $-1$ DOWNTO $0)$;

L$,$ E$,$ w : IN STD LOGIC ;

Clock : IN STD LOGIC ;

$Q$ : BUFFER STD LOGIC VECTOR$($N $-1$ DOWNTO $0))$; END SEQ ;

ARCHITECTURE Behavior OF SEQ IS BEGIN

PROCESS

BEGIN

WAIT UNTIL Clock'EVENT AND Clock $\_\text{'}1\text{'}$;

IF $E=\text{'}1\text{'}$ THEN

$IF{L}_{-}=()\text{'}$

Genbits: FOR i IN $0$ TO N $-2$ LOOP

$Q(i)Q(i+1)$;

END LOOP ;

$Q(N-1)w$;

END $IF$ ;

END IF ;

END PROCESS ;

END Behavior ;