In 2006, Roy Martin and his wife, Alice; their son, Hiram;

and Hiram’s wife, Myrna, acquired title to a 240-acre farm.

The deed ran to Roy Martin and Alice Martin, the father and mother, as joint tenants with the right of survivorship, and to Hiram Martin and Myrna Martin, the son and his wife, as joint tenants with the right of survivorship. Alice Martin died in 2014, and in 2017, Roy Martin married Agnes Martin. By his will, Roy Martin bequeathed and devised his entire estate to Agnes Martin. When Roy Martin died in 2019, Hiram and Myrna Martin assumed complete control of the farm. Explain what interest in the farm, if any, Agnes, Hiram, and Myrna Martin acquired on the death of Roy Martin.