Answer:
#3 & #4
Explanation:
Saving money to use against Hitler
Gem and Scout build forts as they were waiting for Dill to come.
In my life for the first time [and,] the image made me believe [of] my mother that I could change [were] the way things *were*.
remove and & of because it makes no sense in the context of the sentence and move were to the end of the sentence.