From 'Ubada ibn al-Samit : The Prophet, , said: "Gold for gold, silver for silver, wheat for wheat, barley for barley, dates for dates, and salt for salt - like for like, equal for equal, and hand-to-hand; if the commodities differ, then you may sell as you wish, provided that the exchange is hand-tohand." (Muslim, Kitab al-Musaqat, Bab al-sarfi wa bay'i al-dhahabi bi al-waraqi naqdan; also in Tirmidhi)

Based on above hadith: -

a. Explain business transaction proposed as by Prophet SAW?

b. Distinguish the types of riba.