Answer the following questions on bonds:

1) What is the difference between interest rate and return on bonds, moreover, should the investors be more concerned about 'interest rate' or 'rate of return'?

2) The return on a bond is necessarily equal or not equal to the interest rate on that bond. Comment on it.

- Please write an elaborative answer (200-300 words), avoid short answer. Thank you - I will give you a like on your effort :)