We want the following program fragment to shift R3 to the left by four bits, but it has an error in it. Identify the error and explain how to fix it. LOOP .ORIG x3000 AND R2, R2, #0 ADD R2, R2, #4 BRZ DONE wwwwww ADD R2, R2, # -1 ADD R3, R3, R3 BR LOOP DONE HALT .END