I cant see it very well zoom up a bit
This one: "Lee noticed a problem and alerts a teacher".
The second verb should not have been changed to present tense.
You should change the verb alert to past tense: "Lee noticed a problem and alerted a teacher".
Hello!
The compound word "dishwasher" means washer of dishes.
The two combined words "dish" and "washer" signal that the machine is used for washing dishes.
I hope this helps answer your question! Have a great day!