Each column (except last) of matrix X contains students' scores in a course assignment or a test. The last column has a weighted combination of scores across all the assignments and tests.

Replace the elements in the last column of this matrix with a GPA calculated based on the following scale:

 Score      GPA    
90 - 100   3 - 4      
80 - 90    2 - 3      
70 - 80    1 - 2      
60 - 70    0 - 1      
Below 60     0       

Assume that no student in this class has scored below 60. Also note that the mapping in the range [60, 100] is linear.

See https://www.mathworks.com/help/matlab/ref/rescale.html

Example

Input:

   100  90  95  95
    70  50  60  60
    80  70  90  80

Output:

   100  90  95  3.5
    70  50  60  0.0
    80  70  90  3.0