A thermometer is taken from a room where the temperature is $19 ^o C$ to the outdoors, where the temperature is $-3 ^o C$. After one minute the thermometer reads $9 ^o C$.
(a) What will the reading on the thermometer be after $5$ more minutes?
,
(b) When will the thermometer read $-2 ^o C$?
minutes after it was taken to the outdoors.