can you help me solve this and explain how to calculate Beta as well?

Tribbles-R-Us has 200,000 shares outstanding and just paid a $0.25 per share dividend. The market risk-premium is 11.00 percent and the risk-free rate is 4.00 percent. What is the company's cost of equity if Tribbles' systematic risk is 10.00% larger than the market portfolio? Enter your answer as a percent rounded to two decimals, but don't include % sign. Numeric Response