После смерти С. Сибирякова принадлежащие ему жилой дом

After the death of S. Sibiryakov, his house, cottage, car, motor scooter and garage were transferred by right of succession to his sons Andrei and Vasily, who became members of common ownership. After 6 months, A. Sibiryakov warned his brother that he intended to sell his share in the inheritance. 15 days after that, A. Sibiryakov signed the sale and purchase agreements in the prescribed manner: Petrov - ½ share in the ownership of a dwelling house, car and garage, with Ivanov - ½ share in the ownership of the cottage and scooter.
V. Sibiryakov, believing that when making the mentioned transactions his preemptive right of purchase was violated, he filed a lawsuit in court for the recognition of these transactions as invalid and the transfer of the rights and obligations of the buyer under the purchase and sale agreements entered into.
What decision will make the court?

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