is 8% for regular income, and Federal tax is 28%, State tax is 6% for capital gain, what are the composite taxes for regular revenue and capital gain?...

Federal tax is 28%, State tax is 8% for regular income, and Federal tax is 28%, State tax is 6% for capital gain, what are the composite taxes for regular revenue and capital gain? $5000 invested in two Bond for 5 years as follow

A) Municipal Bond which gives $180 dividend for every six months, at the end pay $6000

B) Commercial Bond which gives you $275 Dividend for every six months at the end pay $5000

What are the Nominal rate and Effective rate of return for both options?