Read the following scenario and answer all the questions

Sharjah Islamic Bank enters into a Mudaraba contract with Mr. Sultan, where the bank agrees to provide the full capital required for the enterprise. However, as part of the terms of the contract, the bank contributes 70% of the capital in cash for the enterprise and the remaining 30% will be sourced from an existing debt from a third party.

(a). Comment on the validity of this contract in the light of Mudaraba rule.

(b). Discuss the most common sources of funds for Islamic banks