8-10 =400
11-15= 675
16-20= 950
21-25 =1200
There are four small slabs in one column
Less than 7 for 400 slab should be marked in red
Less than 11 for 675 slab should be marked in red
Less than 16 for 950 slab should be marked in red
Less than 21 for 1200 slab should be marked in red
Slabs are in diff column
Numbers are in diff cloumns
11-15= 675
16-20= 950
21-25 =1200
There are four small slabs in one column
Less than 7 for 400 slab should be marked in red
Less than 11 for 675 slab should be marked in red
Less than 16 for 950 slab should be marked in red
Less than 21 for 1200 slab should be marked in red
Slabs are in diff column
Numbers are in diff cloumns