Löydätkö säännön aikojen välille? Jatka.

a. s [[$\quad$]]→ [[$\quad$]]1 min [[$\quad$]]→ [[$\quad$]] 1 min 30 s [[$\quad$]]→ [[$\quad$]] min [[$\quad$]]→ [[$\quad$]] 2 min 30 s

b. 45 s [[$\quad$]]→ [[$\quad$]] 1 min 15 s [[$\quad$]]→ [[$\quad$]] min s [[$\quad$]]→ [[$\quad$]] min s [[$\quad$]]→ [[$\quad$]] 2 min 45 s

c. 20 s [[$\quad$]]→ [[$\quad$]] 40 s [[$\quad$]]→ [[$\quad$]] min [[$\quad$]]→ [[$\quad$]] min s [[$\quad$]]→ [[$\quad$]] 1 min 40 s [[$\quad$]]→ [[$\quad$]] min

d. 5 s [[$\quad$]]→ [[$\quad$]] 30 s [[$\quad$]]→ [[$\quad$]] s [[$\quad$]]→ [[$\quad$]] 1 min 20 s [[$\quad$]]→ [[$\quad$]] min s [[$\quad$]]→ [[$\quad$]] min s