阅读对话，判断下列句子正误

Mark: Hi, Alice! Would you like to have a picnic?

Alice: Sure. Are you free(空闲) on Monday?

Mark: No, I'm busy. I go to the library on Monday. What about Tuesday?

Alice: No. I play the piano on Tuesday. I'm free on Monday, Thursday and Friday.

Mark: I'm free on Friday.

Alice: OK! Let's have a picnic on Friday.