Need some information on BW4HANA - Hybrid modelling

Hello BW Experts,

After a extensive search on google am posting my questions here. Kindly reply me if you have some time.

1.) What is Hybrid modelling in BW4HANA ?

2.) Can we build Composite provider on ADSO N calculation view?

3.) If i have a powerful object called ADSO , why should i go for calculation view that too scripted one?

Thanks in advance.

Raki