How many exams are scheduled before Saturday?

The exam schedule on Saturday is of 100 minutes. There are two exams scheduled between Hindi exam which is for 100 minutes and Chemistry exam which is for 60 minutes. Using the above mentioned hints, we have drawn a table shown below. Social  exam is for less than 60 minutes and is scheduled immediately before Arts exam. Arts exam is before Sunday and there are two days between Sunday and Social  exam. After using the above hints our table looks like this. Here, Case 2A fails because we cannot fit Computer exam in this case without contradicting the given hint. Here, we can fill the rest of the slots easily with Physics exam on Tuesday and duration of 90 min. for Arts exam. The final puzzle is as follows: