Directions: Read the information given below to answer the questions.

(i) Mohan‘s reading schedule consists of reading only subject on a given day of the week.
(ii) The subjects are Physics, Chemistry, Mathematics, Biology, and Social Science.
(iii) Monday to Saturday are reading days including one day only for play. Sunday is a complete holiday for Mohan.
(iv) Mathematics day is neither on the first day nor on the last day but earlier than the Chemistry day.
(v) Biology day is on the immediate next day of Chemistry day.
(vi) Physics day is on the immediate previous day of the play day.
(vii) Biology day and Social Science day have a gap of two days between them.
(viii) Social Science day is on the immediate next day of the play day

Physics day and Biology day have a gap of how many days between them?