In a meeting seven teachers are shifting in a row, 'T3' is sitting left to 'T2', but on the right T4. T1 is sitting right to T2. T6 is sitting right to T5 but left to 'T4'. T7 is sitting left to T5. Find the person sitting in the middle.

T4

'T3' is sitting left to 'T2', but on the right T4.

=> _, _, _, T4, T3, T2, _

T1 is sitting right to T2.

=> _, _, _, T4, T3, T2, T1

T6 is sitting right to T5 but left to 'T4'.

=> _, T5, T6, T4, T3, T2, T1

T7 is sitting left to T5. 

=> T7, T5, T6, T4, T3, T2, T1

Thus, T4 sits in the middle.