A. fill in the blanks in the table below to find the ratios to represent the various essay grading rates. then use the ratios to write a rational equation. professor ma's grading rate essays _hours chen's grading rate essays hours combined grading rate essays hours equation: b. identify the lcd for the equation. solve the equation by multiplying both sides by the lcd. show all the steps necessary to find the answer. then write a sentence to describe what the answer means for this situation.