How to solve these 2 questions based on the data provided?

Using the % difference method, calculate the % difference between the PhET value of charge and your calculated value

C (F) A (m) D (m) V () E (N/C) Q (C) U(J) PhET 0.89 * 10-12 4.0 * 104 0.004 0.300 2.7*10-13 4.0 * 10-14 Values Calculated 75 2.67*10-13 4.01 * 10-14 Values