Implement the function to calculate the alive rate for 30 days
Implement the function to calculate the alive rate for 30 days

level-five/umakadata-1,level-five/umakadata-1,dbcls/umakadata,dbcls/umakadata,level-five/umakadata-1,dbcls/umakadata,level-five/umakadata-1,dbcls/umakadata