13) (4 pts) Squaring a number is useful in many other algorithms. This assembly routine calculates the square of an unsigned integer. How long does this take in clock cycles (worst case). Assume ARM 32 bit instruction set and the integer is in R0 before we begin. AREA L.textl, CODE, READONLY PROC EXPORT square square MOV R1,RO; CMP R1, #0 ANDS R3,RO,R1 BNE skip ADD RO,R1, LSL R3; MOV R2,R2, LSL #1 CMP R2, #0 BNE loop BX LR loop skip ENDP ALIGN END 14) (2pts) Name one code change to the program in 13 to make it faster