A stationery shop arranges pens into boxes, with the same number of pens in each box. There are 9 boxes. If 4 more pens were put into each box, the shop would have 198 pens in total.
(a)How many pens are currently in each box?(2)
(b)How many pens does the shop currently have in total?(1)
(c)If instead 3 of the boxes were removed entirely (keeping 18 pens in each remaining box), how many pens would remain?(1)
(Total for Question 25 is 4 marks)