Answer:
a. Other Comprehensive income for 2020 = Unrealized holding loss = -$10.9 million
b. Comprehensive income for 2020 = Net income - Unrealized holding loss = $1,245.7 million -$10.9 million = $1,234.8 million
c. Accumulated other comprehensive income at December 31, 2020 = Accumulated other comprehensive income - Other Comprehensive income for 2020 = $57.2 million - $10.9 million = $46.3 million