I would really appreaticite it if somebody help[ me correct these sentences PLZ! 3. And then finally that perfect bing! rings out throughout the house, and my aunt comes into the kitchen with her pot handles on, and slowly slides the tray out of the oven, and the cookies are exactly the way they are supposed to be, a pale gold on top and warm brown on the bottom, with small pools of chocolate lying on top of them. (Context: An aunt makes her family cookies.)

4.A year ago, when I went to meet Britney Spears at her concert, it changed me to become grateful and optimistic to my friends and family. (Context: A student meets a pop star backstage and becomes totally disillusioned by her behavior.)

5.It is a private school that in order to attend the school, you have to pay a $20,000 tuition fee. (Context: From an essay comparing a public and a private school.)
Thank you !!