Answer:
False.
Step-by-step explanation:
Hanna will lose the case, because the binding contract established between them is not valid for a court, because the factors that determine that the agreement is valid were not established correctly.
In the contract that Niels and Hanna signed it was only established that Niels would sell and that Hanna would buy. This is not enough for the court to assume that there was a breach of contract on Niels' side. For that, it would be necessary that the contract signed between them had established, the price for the lot, how the payment would be made, how the purchase would be financed, how the price was established, among other factors.
In short, Hanna would lose the case because the contract is vague and invalid, not establishing a real commitment between her and Niels.