I very confused about active voice and passive voice, Following these sentense Plaese explain me why frist sentense is passive voice and second sentense is active voice

1. The Contractor shall be responsible for the design, supply and test the
automatic flow control system for remote manual and automatic
control of the penstocks.

2.The Contractor shall design and implement temporary flow diversion
to ensure that screw pump installation at the Stage IV Inlet Works is
carried out in a safe and dry working condition.