Bamidele Diop entered into an agreement of purchase and sale with Elton Singh. Under the terms of that contract, she immediately paid $50 000 and promised to pay the remainder of the $500 000 price within six months. In exchange, Elton promised to transfer title to the property, known as White Oaks Landing, to Bamidele within three months. Create additional facts that would subsequently lead to the enforcement of (i) a purchaser's lien and, alternatively, (ii) a vendor's lien. Explain the nature and effect of each type of lien.