Please help, I am very confused on this problem

Estimating the Weighted Average Cost of Capital Kellogg Company manufactures cereal and other convenience food under its many well~known brands such as Kellogg's, Keebler, and Cheez-lt. The company, with over $135 billion in annual sales worldwide, partially nances its operation through the issuance of debt. At the beginning of its 2015 fiscal year, it had $6.5 billion in total debt. At the end of scal year 2015, its total debt had increased to $6.6 billion. Its scal 2015 interest expense was $227 million, and its assumed statutory tax rate was 37%. Kellogg has an estimated market beta of 0.60. Assume that the expected risk-free rate is 2.5% and the expected market premium is 5% Kellogg's stock closed at $76.38 on December 31, 2015. On that same date, the company had 420,315,589 shares issued, of which 70,291,514 shares were in treasury. a. What is Kellogg's total market capitalization as of December 31 , 2015? Enter answer in billions, rounding to one decimal place. S 2.5 X billion b. Compute Kellogg's WACCt Use your rounded answer above for computation. Round answer to one decimal place (ex: 0.0245 = 2.5%). 4.4 X %