please show work.

2. In 2019, the bookkeeper for a company mistakenly recorded an entry for a two-year contract as cash basis rather than accrual basis and made no adjustment at year-end. The mistake was not caught and resulted in the following errors: Assets 12/31/19 NE Assets 12/31/20 NE Assets 12/31/21 NE Liabilities 12/31/19 NI 2019 Equity 12/31/19 Understated - $765,000 Overstated - $765,000 Overstated - $765,000 Liabilities 12/31/20 NI 2020 Equity 12/31/20 Understated - $225,000 Understated - $540,000 Overstated - $225,000 Liabilities 12/31/21 NI 2021 Equity 12/31/20 NE Understated - $225,000 NE a. Determine the date the contract was signed (month/day/year). b. Determine the dollar value of the contract when it was signed. c. Determine whether the missing adjusting entry is an accrued expense, accrued revenue, deferred expense or deferred revenue and explain your rationale (lucky guesses don't merit points)