present perfect continious сделайте 5 вопросов и ответы пожалуйста

1. How long have you been making a cake? I have been making a cake for two hours already.2. How long has yourfriend been drinking coffee? — Your friend has been drinking coffee for 20 minutes . 3. Have students been reading this text for thirty minutes? — Students have been reading this text for thirty minutes. 4. What has she been singing the whole evening? — She has been singing songs the whole evening. 5. Has John been preparing dinner since 3 o'clock? — John has been preparing dinner since 3 o'clock.