Put the relative clauses (a-f) in the correct place in the sentences (1-6)

Put the relative clauses (a-f) in the correct place in the sentences (1-6).

1 Are these the keys b/ which you can't find?

2 Do you remember the restaurant d/ where we had our first meal together?

3 Do you know the name of that hotel c/ which has double rooms for 50 euros?

4 That's the woman e/ who offered me her seat on the bus.

5 My sister introduced me to a man a/ who has his own software company.

6 I can't fin that bag f/ which you gave me.