The following figures have been extracted from the financial statements of MRT Ltd:

> Book Value of Current Assets $35 million and Current Liabilities $29.25 million

> Long-term Loan: $6.84 million

> Retained Earnings: $22.50 million

> 10% Debentures: $26 million debentures issued at $1,000.

> General Reserves $7.50 million

> Preference Share Capital: 9.5 million shares issued at $3 per share

> Ordinary Share Capital: 35 million shares issued at $1 per share

The following additional information has been provided by the manager of the company:

> Government bonds are currently yielding 6.2% per annum.

> The current market return on equity is estimated to be 14.3% per annum.

> A merchant banker suggests that MRT Ltd would have to offer a rate of 11.6% p.a. on any new issue of 20-year debentures.

> Debenture coupons are paid semi-annually, with 20 years to maturity.

> The company tax rate is 32%.

> Preference shares of MRT Ltd are currently traded at $3.61 per share

> MRT Ltd ordinary shares have recently traded at $4.82 and the company's financial manager believes that a beta of 1.7 is appropriate for the company.

Requirement-A. Using relevant information, estimate the weighted average cost of capital for MRT Ltd.

Requirement-B. Using your own words, explain any four relevant factors that can affect the cost of capital.