During a winter week in a hill station the maximum temperatures (in °C) were recorded as follows:
Monday −2.5, Tuesday 0, Wednesday 3.4, Thursday −1.2, Friday 1.8, Saturday 2.3, Sunday −3.1
(i) Arrange the temperatures in ascending order.
(ii) Calculate the range of the temperatures for the week.
(iii) On the next Monday the maximum temperature rose to 6.5 °C. Re-calculate the range including this new value and comment on how the spread has changed.