My FI and I have 3 kids (I have 2 from a previous and he has 1 from previous) and what we're thinking of doing his having his daughter, who is 10 now (but 11 at the time of wedding) be a Juinor BM and my son who is 10 at the time of the wedding be like a junior groomsman. My youngest boy who will be 5 at the time will be the ring barer and walk with his niece who is the flower girl. Is that acceptable and are the 2 older ones the right ages for the junior roles?