A sum of ₹ 8,000 is invested for 2 years at 10% per annum compound interest. Calculate:

(i) interest for the first year.

(ii) principal for the second year.

(iii) interest for the second year.

(iv) final amount at the end of the second year.

(v) compound interest earned in 2 years.

A man borrowed ₹ 20,000 for 2 years at 8% per year compound interest. Calculate:

(i) the interest for the first year.

(ii) the interest for the second year.

(iii) the final amount at the end of the second year.

(iv) the compound interest for two years.

Calculate the amount and the compound interest on ₹ 10,000 in 3 years at 8% per annum.

Calculate the compound interest on ₹ 5,000 in 2 years, if the rates of interest for successive years are 10% and 12% respectively.