A stationery shop reported its profit (in ₹) for the first six months of the current year in a brief note:
"Our profits were steady with April giving us ₹8,250, May ₹9,100 while January had touched ₹7,500. February recorded ₹7,950, June yielded ₹8,600 and March showed ₹8,050. Last year December had shown ₹8,700."
(a) Extract the profits for the current year from the note and write them as a list beginning from January to June.
(b) Identify the highest and the lowest monthly profit.
(c) Calculate the range of the monthly profits for the first six months of the current year.
(d) Comment in one sentence on what this range tells you about the stability of the shop’s profits.