Answer:
(a) The forecast temperature was the same as the actual temperature on Tuesday, Friday and Sunday. (b) The maximum forecast temperature during the week was \[{{35}^{o}}C\]. (c) The minimum actual temperature during the week was \[{{15}^{o}}C\]. (d) Day Difference in the actual temperature and the forecast temperature Mon \[{{17.5}^{o}}C-{{15}^{o}}C={{2.5}^{o}}C\] Tue \[{{20}^{o}}C-{{20}^{o}}C={{0}^{o}}C\] Wed \[{{30}^{o}}C-{{25}^{o}}C={{5}^{o}}C\] Thu \[{{22.5}^{o}}C-{{15}^{o}}C={{7.5}^{o}}C\] Fri \[{{15}^{o}}C-{{15}^{o}}C={{0}^{o}}C\] Sat \[{{30}^{o}}C-{{25}^{o}}C={{5}^{o}}C\] Sun \[{{35}^{\text{o}}}C-{{35}^{\text{o}}}C={{0}^{\text{o}}}C\] Therefore, the actual temperature differed the most from the forecast temperature on Thursday.
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