Calculate time in BEx?

Hi ALL,

my source MS-SQL one object was time - 1,2,3,4 seconds like that.

but we want calculate the time at bw side or bex side?

apart form that i have to create time slabs for time (ex - 1-2 min, 3-10 mins, 11-40 mins, 41-80 mins, 81- 100 mins, above 100 mins).

Thanks