how to find the probability?

The average salary of merchandisers is $50,000 per year with a standard deviation of $6000. a. What is the probability that a merchandiser earns more than $67,000 per year? (Round z-score computation to 2 decimal places and the final answer to 4 decimal places.) Probability b. What is the probability that a merchandiser earns less than $30,000 per year? (Round z-score computation to 2 decimal places and the final answer to 4 decimal places.) Probability c. What is the probability that a merchandiser earns between $42,000 and $58,000 per year? (Round z-score computation to 2 decimal places and the final answer to 4 decimal places.) Probability d. What is the probability that a merchandiser will earn between $36,000 and $64,000 per year? (Round z-score computation to 2 decimal places and the final answer to 4 decimal places.) Probability e. What is the average salary below which 23% of the merchandisers earn? (Round the final answer to the nearest whole number.) Salary S f. What is the average salary above which the top 6% of the merchandisers eam? (Round the final answer to the nearest whole