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--- a/cws/main_cw01.tex	Wed Nov 02 21:49:42 2022 +0000
+++ b/cws/main_cw01.tex	Thu Nov 03 09:55:11 2022 +0000
@@ -206,7 +206,13 @@
   \end{verbatim}
 
   as profit for that year, and our new balance for 2011 is \$125 when
-  converted to a \texttt{Long}.\mbox{}\hfill\mbox{[1 Mark]}
+  converted to a \texttt{Long}. Since \texttt{yearly\_yield} should
+  produce a \texttt{Long}, there are a number of ways how to round
+  doubles.  One way to do the calculation is to calculate the profit
+  first as \texttt{Double}, and then round the result down to a \texttt{Long}
+  (using \texttt{.toLong}) and add it to the balance (which is also a
+  \texttt{Long}).\\
+  \mbox{}\hfill\mbox{[1 Mark]}
   
 \item[(7)] Write a function that calculates the overall balance
   for a range of years where each year the yearly profit is compounded to
@@ -237,9 +243,9 @@
 of companies that went bust or were de-listed over the years.
 So where does this leave our fictional character Mr T.~Drumb? Well, given
 his inheritance, a really dumb investment strategy would have done
-equally well, if not much better. And one would assume this guy is
-by now locked up in prison and the key thrown away, but alas he
-is still around annoying commonsense people.\medskip
+equally well, if not much better. Anyhow, one would assume that this
+guy is by now locked up in a prison and the key thrown away, but alas he
+is still around annoying commonsense people. What a pity.\medskip
 
 \end{document}
 

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--- a/main_templates4/README.md	Wed Nov 02 21:49:42 2022 +0000
+++ b/main_templates4/README.md	Thu Nov 03 09:55:11 2022 +0000
@@ -5,4 +5,5 @@
 * reference jar:
      [knight1.jar](https://nms.kcl.ac.uk/christian.urban/knight1.jar),
      [knight2.jar](https://nms.kcl.ac.uk/christian.urban/knight2.jar),
-     [knight3.jar](https://nms.kcl.ac.uk/christian.urban/knight3.jar)
\ No newline at end of file
+     [knight3.jar](https://nms.kcl.ac.uk/christian.urban/knight3.jar),
+     [knight4.jar](https://nms.kcl.ac.uk/christian.urban/knight4.jar)
\ No newline at end of file

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