How can I lose weight by summer vacation?

I seriously need to lose about 10-20 pounds before the end of May. I am around the age of 13 and I’m not just losing weight to look skinnier, I am trying to lose weight and get more exercise so that I can do more activities in the summer without getting exhausted very easily. What are some exercises I can do to lose weight around my arms, waist, and legs. And also some healthy food suggestions.
Please help.
Thank you.

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