Can We Pray to Mary? Do Catholics Worship Mary? Examining Marian Doctrines

Mary veneration is unbiblical and dangerous spiritually. Why does the Catholic Church and the Orthodox Church venerate Mary like worship? Can we pray to Mary? Is praying to Mary biblical? Is praying to Mary committing idolatry? Roman Catholics and those who of the Orthodox Church pray to Mary, dead saints, or what is called the Communion of Saints. Are the 4 Mary Dogmas aka Marian Doctrines (Theotokos, Immaculate Conception, Assumption of Mary, Perpetual Virginity) biblical? The Catholic Church teaches Mary is a co-mediator a co-mediatrix, yet the Bible teaches Jesus is the Mediator between God and man.