(a)[1]
At midday the temperature is $8^{\circ}\text{C}$. By midnight it is $12^{\circ}\text{C}$ lower. Determine the temperature at midnight.
(b(i))[1]
Shazia notes the temperature, in $^{\circ}\text{C}$, at 6 am each day over one week: $5, 2, -1, -7, -2, 5, -5$. Find the median.
(b(ii))[1]
Work out the range.