Fasting

If there are substances that you swallow, it invalidates fasting.

If the illness is chronic and there is no possibility of recovering from it, a person should feed one poor person for every day missed.

It is valid.

No, it doesn’t affect your fasting.

It is not permissible to drink after the break of dawn. If you believe that the Athan is called before the actual break of dawn, you can drink. But if you don’t know, you shouldn’t drink.

If the 10 oaths were over the same thing, there is only one Kaffarah. But if they are 10 different things, there should be 10 different kaffarah. If he can gather 100 poor person and feed them at the same time, this is permissible.

The fasting is OK.

If a woman sees her purity before the break of dawn and intends to fast, her fasting is permissible.

If her illness was not diagnosed by doctors to be terminal, she must fast the missed days.

Yes, you can.