Check the conjugation table. You need a plural present auxiliary (second person is jste) and a plural past participle (byli, byly, byla). If you choose a gender for the participle, the gender of rádi, rády, ráda must agree.
I believe VladaFu's answer to yoelchico, currently directly above (1 Mar 2020), also answers your question. Please always read the existing discussion before posting; often a question has already been answered.