Please review assignment 2, 3, 4 of Networking & Security

Hi!
Could you please review my assignments 2, 3, 4 of Networking & Security by the links below:

https://www.coursera.org/learn/security/peer/sdAsR/02-instagram-network-api-app/review/CGqQ7gjnEembZRIjSo4MTg

https://www.coursera.org/learn/security/peer/kiUSO/03-push-notification-alarm/review/O7X2NgmyEemH3Q5_SOdmoA

And the assignment 4:

https://www.coursera.org/learn/security/peer/msgK2/04-secure-data-storage-app/review/6ES8cQp5Eem_NQ6JYupVDA