Given the information below, what is a good estimate of this company's R_d?

• current stock price = $89.31
• yield to maturity on the company's bonds = 6.2%
• current bond price = $1,073.15
• long-term return on the S&P 500 = 11.5%
• stock beta = 0.95
• risk-free rate = 3.2%
• total shareholders' equity = $17.8 million