Can anyone help me fix my code!!!

/**

*

* @param row1

* @param column1

* @param row2

* @param column2

* @return average of values of all DataEntry objects in given address range

* ((row1, column1) to (row2, column2))

* return 0 if there are no items in the given range

*/

public double average(int row1, int column1, int row2, int column2) {

double sum = 0;

int count = 0;

for(DataEntry dataEntry : data)

{

if(dataEntry.inRange(row1, column1, row2, column2))

{

sum += dataEntry.getValue();

count++;

}

} return sum / count;

}

@Test @Graded(description="Worksheet:average()", marks=4)

public void testAverage() {

assertEquals(4.5/8,sheet.average(0, 0, 6, 6), 0.01);

assertEquals(2.6/6,sheet.average(0, 0, 5, 6), 0.01); //without the 0 and 1.9

assertEquals(4.6/7,sheet.average(0, 0, 6, 4), 0.01); //without the -0.1

assertEquals(-4.7/2,sheet.average(0, 3, 5, 3), 0.01); //4th column only

assertEquals(0.4/2,sheet.average(4, 1, 4, 10), 0.01); //5th row only

assertEquals(0,sheet.average(3, 0, 3, 10), 0.01); //4th row only - nothing there

int mark = 4;

marks+=mark;

message+="Worksheet:average() passed. Marks awarded: "+mark+" ";

}