Answer:
1. Total interest rate is $166,790
2. Refer to the attached file for the straight-line amortization table for the bonds' life.
3.
To record interest rate paid in 30th June 2018:
Dr Interest expenses               16,679
Dr Premium on bond payable       4,521
Cr Cash                         21,200
To record interest rate paid in 31st Dec 2018:
Dr Interest expenses               16,679
Dr Premium on bond payable       4,521
Cr Cash                         21,200
Explanation:
Total interest rate as followed : Interest payment - Premium on bond payable = 530,000 x 8% /2 x 10 - (575,210 - 530,000) =166,790.