The purchaser or his assignee shall, at least 30 days before he applies for a deed, serve upon the owner of the land, and upon the occupant of the land if it is occupied, a written notice setting forth:

1. (a) A description of the land.
2. (b) That the land has been sold for a delinquent assessment (specifying the improvement for which the assessment was made).
3. (c) The amount for which the land was sold.
4. (d) The amount necessary to redeem at the time of giving notice.
5. (e) The date when such purchaser or assignee will apply to the tax collector for a deed.