Sielert Corporation borrowed $600,000 from National Bank on May 31, 2011.

Hi can you please explain the steps I am having trouble with these problems thanks!

1)Sielert Corporation borrowed $600,000 from National Bank on May 31, 2011. The three-year, 7% note required annual payments of $228,630 beginning May 31, 2012. Interest expense for the year ended December 31, 2011 was?
$0.
$24,500.
$28,000.
$42,000.

Downs Company issued $800,000 of 8%, 5-year bonds at 106, which pays interest annually. Assuming straight-line amortization, what is the total interest cost of the bonds?
$272,000
$224,000
$368,000
$320,000

Winrow Company received proceeds of $377,000 on 10-year, 8% bonds issued on January 1, 2011. The bonds had a face value of $400,000, pay interest annually on December 31st, and have a call price of 101. Winrow uses the straight-line method of amortization. What is the carrying value of the bonds on January 1, 2013?
$400,000
$381,600
$395,400
$379,300