sagotan ninyo please i need it now please im begging you

Answer:
a) Interest- PHP 4.000.00
Total Amount- PHP 21.000.00
b) Rate of Interest- 18%
Total Amount- Php 41.000.00
c) Principal- PHP 69.720.00
Total Amount- PHP 61.320.00
a) How much is the principal in A) PHP 25.000.00
B) PHP 50.000.00
b)What is the rate of Interest in A) 9%
C) 12%