Jack lives with his wife, Janet in a house. It was registered in both their names on a joint tenancy basis. Jack became critically ill and eventually died. Janet remarried Jason. Janet told Jason that the house was as much his as it was hers and that he did not have to worry about the future. Jason was a stay home husband, did most of the household chores and took care of minor repair works in Janet's absence.

Janet then met with an unfortunate accident and died. In her will, it transpired that the sole beneficiary of the house was her sister, Mary.

Advise Jason on the following

(i) Whether Jason has any legal interest in the house.

(ii) Whether Jason has an equitable interest in the house based on resulting trust.

(iii) Whether Jason has an equitable interest in the house based on constructive trust