I need help with 4 questions

The owner of the plant nursery where you were tells you to fill 350 ml bottles from a 30 l from a fertilizer

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?