Doubts about how to construct a sentence

[dilodi83]

1) The first doubt I have is in this sentence:

I want to confirm both the classes on Monday and the ones on Tuesday.

Is it correct to say this or would it be better saying...?

I want to confirm both Monday classes and Tuesday ones.

2) The second doubt I have is in this sentence:

Can you tell me where the classes are to take place?

Is this construction correct? Or is it better to say:

Can you tell me where the classes will take place?

Thank you verry much.

[bhaisahab]

1) The first doubt I have is in this sentence:

I want to confirm both the classes on Monday and the ones on Tuesday.

Is it correct to say this or would it be better saying...?

I want to confirm both Monday classes and Tuesday ones.

2) The second doubt I have is in this sentence:

Can you tell me where the classes are to take place?

Is this construction correct? Or is it better to say:

Can you tell me where the classes will take place?

Thank you verry much.

1) "I want to confirm that I will attend the classes on Monday and Tuesday."
2) Both are OK.