5,6, and 7 please! Thank you so much!

5 What is the taxable equivalent yield on a municipal bond with a YTM of 3.5 percent for an investor in the 30 percent marginal tax bracket? 6. 1 Walmart just paid a dividend of $1.46 (D) and raises its annual dividend by nearly 6 percent, what will the new dividend (D) be? 7. ALCX's preferred shares are trading for $85.49. These shares pay a dividend of $3.75 per year. What is the required return on this stock