Here is the translation of your text into English:
Dear [Name],
Thank you very much for your letter! I am glad that you wrote. In response to your question about the weekend: I plan to spend time with my family and possibly read an interesting book. As for studying, I think it's important to find a balance between work and rest. Regarding my summer plans, I hope to go on a trip and learn something new about the culture of another country. I would be happy to hear about your plans!
Best wishes,
[Your Name]
Feel free to replace "[Name]" and "[Your Name]" with the appropriate names!