help to find the answer

Scenario 2 In response to a canvass for donations to the Dalhousie Campaign Fund, Arthur Boutilier pledged $5,000. After he signed the pledge form, he suffered severe nancial problems that prevented him from honouring the pledge. In responding to a request from the college that he make the payment, he said, "In reply I desire to advise you that l have kept my promise to you in mind. As you are probably aware, since making my promise I suffered some rather severe reverses, but I expect before too long to be able to redeem my pledge." As a consequence of the funds pledged in the campaign, the college expended large sums of money on the various projects mentioned in the campaign. Unfortunately, Mr Boutilier died b.r.is pledge could be redeemed, and the college commenced action against his estate for $5,000 for breach of contract. Question 1: Is the estate liable for breach of contract for the failure of Arthur Boutilier to honour his $5,000 pledge to the college? Question 2: What if the college in the terms of the subscription stipulated that those who pledged at least $5,000 would have their name memorialized on a plaque mounted on the wall at the entrance of the newly constructed building? Question 3: Would the promised donation be enforceable under the doctrine of promissory estoppel