NationalAnthemOfWorld app for iPhone and iPad

It contains National Anthems of world.
we can choose any country name from list. After that we will get Screen where we can listen national anthems of our choice.
In this screen, we will get multiple functionalities as follows.
a. Play and Pause button: These buttons are used to play the anthem and pause the anthem.
b. Next and Previous button: By pressing next button we can listen next country anthem. And by pressing previous button we can listen previous country anthem.
c. Mute Slider: Whenever we slide the slider button to the left, volume will mute. If we slide the slider button to the right, volume will increase.
d. Duration Slider: In slider button, in the left it show the anthem current running duration and at the right, it will show the the total duration of the anthem.