True or false?

1) Currency trading lacks profitability for large commercial and investment banks but is maintained as a service for corporate and institutional customers.

2) The primary motive of foreign exchange activities by most central banks is profit.

3) Most transactions in the interbank foreign exchange trading are primarily conducted via telecommunication techniques and little is conducted face-to-face.

4) Nondeliverable Forwards were originally envisioned as a method of currency speculation, but it is now estimated that 70% of NDFs are trading for hedging purposes.

5) A contract to deliver dollars for euros in six months is both "buying euros forward for dollars" and "selling dollars forward for euros."