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: $5.26 million

> Retained Earnings: $22.50 million

> 92% Debentures: $540 million debentures issued at $1,000.

> General Reserves $7.50 million

> Preference Share Capital: 2,031.0 million shares issued at $5 per share

> Ordinary Share Capital: 10 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 1,228.0% per annum.

> The current market return on equity is estimated to be 11.1% per annum.

> A merchant banker suggests that MRT Ltd would have to offer a rate of 9.6% p.a. on any new issue of 14-year debentures.

> Debenture coupons are paid semi-annually, with 14 years to maturity.

> The company tax rate is 14%.

> Preference shares of MRT Ltd are currently traded at $6.51 per share

> MRT Ltd ordinary shares have recently traded at $11.20 and the company's financial manager believes that a beta of 52.0 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.