Exercise $5$: Static Slicing $[10\%]$

Consider the following Java code which reads in exam marks from array "marks" $($values have been added to this array in preceding code$)$ and prints the number of passes and fails, the sum of all marks, the average mark and the pass rate:$7$int count $=0$;for$($int i$=0$;i $$ marks.length;i$++)\{$totalMarks $=0$;if $($marks$[$i$]>=40)$pass $=$ pass $+1$ ;if $($marks$[$i$]<mtext\; id="EditorElement\_502259"></mtext><mn\; id="EditorElement\_502260">4</mn><mn\; id="EditorElement\_502261">0</mn><mi\; id="EditorElement\_502262">)</mi>$fail $=$ fail $+1$;count $=$ count $+1$ ;totalMarks $=$ totalMarks$+$marks$[$i$]$;$\}$println$("$Out of$"+$ count $+","+$ pass $+"$ passed and $"+$ fail

$"$ failed."$)$;

println$("$The sum of all marks is $"+$ totalMarks$)$;

int average $=$ totalMarks$/$count;

println$("$The average is $"+$ average$)$;

passRate $=($pass$/$count$)**100$;

println$("$This is a pass rate of $"+$ passRate$)$;

a$)[6\%]$ The program is not printing a correct average value. Construct the backward slice $($at the point of the line of code that prints the average$)$ to locate the root cause for this and correct the code.

b$)[4\%]$ Determine whether the corrections you made have any negative effects by constructing suitable forward slices.