David bought unit trusts and invested for income. He invested 150,000 in a unit trust with an offer price of 75 per unit, and sold the units after 3...

David bought unit trusts and invested for income. He invested £150,000 in a unit trust with an offer price of £75 per unit, and sold the units after 3 years at the same price. During this period he received income from the units of £38,400. This income was not reinvested in units.Calculate:(a) the number of units purchased(b) the percentage yield per annum(c) the (3 year) income per unit.