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Question 4 a. Briefly explain (with example), how Maslahah and Sadd Zaria'h (secondary sources of shariah law) are used in determining the rules and regulation related to Islamic banking and finance. (10 marks) b. Discuss the Shariah stand of income/profit generated from the illicit capital. For example, a robber robbed $100,000. Then, this $100,000 has been made as capital in a legitimate business. Later, this capital has increased to become $250,000 from the business. If he then repent, explain what he should do with the money that is use for the capital and the increment of $150,000. (15 marks)