What does any of that have to do with Mary participating in redemption? If you mean, she must accept the gift offered to her, so be it. But, if it in any way goes beyond herself, wrong answer. Redemption is totally the work of Jesus Christ...Mary in no way participates in that!
You have an amazingly naive theology of redemption!
Not naive, simple maybe. As I see it, God created man and woman with the intention that they would live together in love. Before the fall, God visited with man and woman, spoke with man and woman and all was well. Then through man and woman came sin and the wages of sin death. Now, God knew this even before He created man and woman. And from the beginning, He knew that the second person in the Holy Trinity would come to earth as a man to redeem His created ones. This person, Jesus, paid the debt owed by all humanity for sin. His payment opened the gates of heaven so that man and woman could once again live with God in paradise.
Now, just as sin comes through a man and a woman, so too does redemption. Jesus and Mary, as foretold in Genesis, the woman and her son. It's not naive. The woman led the man to sin because of her pride and disobedience. Mary, because of her humility and obedience gives birth to Jesus, who then redeems us. Not naive, simple maybe, but I have been accused of worse:)
Mary was a part of God's plan from the first. She was chosen and given every grace needed to be able to say yes, but never was her free will taken from her. So, yes, she shares Jesus' redemptive mission and every time you or I spread the Gospel, share His message or show love in His name, so do we.