SOLVE THE FOLLOWING PROBLEMS AND SHOW YOUR COMPLETE SOLUTIONS. EXPLAIN YOUR ANSWER FOR BETTER UNDERSTANDING. 1. Find the interest and amount on PhP 10,500 at 8% simple interest for 10 months. 2. Find the interest and amount on PhP 8,250 at 7-%simple interest for 7 years. 3. Find the interest and amount on PhP 1,200 at 11% simple interest for 2 years and 5 months. 4. If a principal of PhP 2,500 earns interest of PhP 185 in 3 years and 3 months. What interest rate is in effect? 5. A principal earns interest of PhP 385 in 2 years and 9 months at a simple interest rate 9-%. Find the principal invested?