Rewrite the following sentences to make them sound appropristely polite: 1.where is the venue for the meeting. 2.it is an important telephone call. can i take it right now? 3.we cannot launch the product next week as we had promised earlier. 4.cancel all my appointments in the evening.

1. could you please tell me where the venue is for the meeting
2. this is an important phone call, is it all right with you if i take it right now?
3. we aren't able to launch the product next week because of promises we made, but we will launch it as soon as we can. 
4. when you have time, please cancel all my appointments in the evening