If I have correctly interpreted, while Mr. Madhu's opinion suggests that the weekly off is +3 days, Mr. Banerjee opines the weekly off is +2 days working. Needs more elaboration.
Section 52 Interpretation
Section 52 states that an adult should have a holiday for a whole day on one of the three days immediately before or after the said day. This means we will have to give the weekly off on the third day, that is on the 24th of April, as suggested by Mr. Banerjee.
However, if we consider the last part of Section 52 (I), which states, "Provided that no substitution shall be made which will result in any worker working for more than ten days consecutively without a holiday for a whole day," it implies that a weekly off can be given on the 4th day, i.e., on the 25th, as suggested by Mr. Madhu.
Needs more debate on the interpretation.
Regards,