If there is no issue, surviving spouse or parent, then the estate goes in equal shares to the brothers and sisters of the decedent and to the lawful issue of any deceased brother or sister by right of representation as follows:
1. To the brothers and sisters, each a share; and
2. To the lawful issue of each deceased brother and sister, by right of representation, the same share that the parent would have received if the parent had been living at the time of the death of the decedent.