Google LLC (Alphabet Inc.) provided the following income statement for the year ended December 31, 2023:

Item	Amount (in millions)
Revenue	$253,054
Cost of Revenue	$94,032
Gross Profit	$159,022
Operating Expenses	$90,187
Operating Income	$68,835
Interest Expense	$849
Income Before Taxes	$68,710
Income Tax Expense	$14,236
Net Income	$54,474

a. Compute Google LLC's gross profit margin. b. Determine the operating income margin for Google LLC. c. Discuss the impact of Google LLC's interest expense on its profitability. d. Analyze the effective tax rate of Google LLC and compare it with industry standards.