QUESTION $1$

Registers:

$t$1=0$x$8$A$7$B$6$C$53$

$t$2=0$x$3344$AB$2$

$t$3=0$xF$3$F$4$BD$21$

What is $s$0$ after:

sll $s$0,$ $t$1,20$

andi $s$0,$ $s$0,0$x$00$FFF$000$

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Please also include a step$-$by$-$step explanation of your process, thank you!