Charlene wrote a letter to Rachel offering to sell her car, a Proton Saga, for RM 60,000. The letter reached Rachel on 25. 11.2020. Rachel sent her letter of acceptance at 3 p.m. on the same day. Charlene later changed her mind and decided to revoke her offer. She tried to contact Rachel by phone at 7 am of 26.11. 2020 but no avail. On 27.11. 2020, she went to Rachel's house and informed her that she would like to revoke her offer. Rachel's letter of acceptance reached Charlene on 29.11.2022. Charlene said that the letter of acceptance was void because she had already revoked her offer. Rachel insists on buying the car and seeks your advice. Advise Rachel.