Find the simple interest, when:
(i) Principal = Rs 2000, Rate of Interest = 5% per annum and Time = 5 years.
(ii) Principal = Rs 500, Rate of Interest = 12.5% per annum and Time = 4 years.
(iii) Principal = Rs 4500, Rate of Interest = 4% per annum and Time = 6months.
(iv) Principal = Rs 12000, Rate of Interest = 18% per annum and Time = 4months.
(v) Principal = Rs 1000, Rate of Interest = 10% per annum and Time = 73days.