Here's a weather report from Des Moines airport $($KDSM$)$:

KDSM $080303Z12004$KT $6$SM BR OVC$00500/$M$02$ A$3010$ RMK A$02$ T$00001017$

Let's ignore the timestamp for this exercise and pretend this is the weather report before a flight.

What is the windspeed in this weather report?

$4$ knots

$12$ knots

$20$ knots