Ju 87B Stuka and its bombs

[Marius]

The famous Junkers Ju 87B Stuka could carry one huge bomb under the fuselage (250 or 500 kg) and 4 bombs a 50kg under its wings.

My question: how had the pilot to drop the bombs? All 5 together? Or the huge bomb at the first diving attack and the other 4x50kg bombs at the second attack? Or had the pilot even the possibility to drop every bomb separately, what means he could make 5 single bombing attacks?

I was searching for these details in the literature but have found nothing.
Can anybody help?

Thanks,
Marius