yes it is allowed in 2PL.
Yes. its possible to execute the schedule in 2PL.
Since schedule is allowed to execute in 2PL then schedule is conflict serializable schedule & conflict serial schedule is the lock point order(lock point is red colored).this way, Equivalent conflict serial schedule is T2 -> T1 -> T3
In this I have shared a table having all types of lock classified as serializable recoverable deadlock-free.