D. Jackson, CPA, audited Washington Company's financial statements for the year ended December 31, 2007. On November 1, 2008, Washington notified Jackson that it was changing auditors and that Jackson's services were being terminated. On November 5, 2008, Washington invited Lincoln, CPA, to make a proposal for an engagement to audit its financial statements for the year ended December 31, 2008.What procedures concerning Jackson should Lincoln perform before accepting the engagement?