Determine the legal status of the following Muslim wills:

1. Before his marriage, Ali executed a wills in favour of his brother. Five years later, he got married and was blessed with a son. Years after that, he passed away.

[7 marks]

2. Shimli made a wills to his sister while his other surviving relatives are his wife, a son and a daughter. Unfortunately his son passed away 5 months before his death. At the time of his death, there was no alteration to the wills.

[8 marks]