Hugo Elite Rollator Walker with Seat, Backrest and Saddle Bag, Blue by Hugo Mobility

How sturdy is it when rising from a seating position?

Can this be used as a wheelchair?

How much strength is needed to apply and lock the hand brakes? My 84-yo mother's balance condition and arthritis often leave her weak/fatigued.

are the brakes easy to adjust,tighten..do they hold firmly when one sits on the seat?