C. Sridar's Sales Services, Inc. is in the business of offering training to the sales forces of large companies on a contract basis.They have had good results in increasing the sales levels of customers' sales personnel.SSS Inc. is working with a potential customer who has collected data of individual sales performance in 4week periods over a long time period.At present, the performance results appear to be approximately normally distributed with a mean sales level of $11,000 per 4week period and a standard deviation of $1,800.

What proportion of the salespeople could be expected to produce sales levels less than $9,000 per 4week period?

What proportion of the salespeople could be expected to produce sales levels greater than $14,000 per 4week period?

What proportion of the salespeople could be expected to produce sales levels at least $9,000 but no more than $14,000 per 4week period?

Salespeople performing at the 80th percentile or above qualify for bonus pay.What sales level must a salesperson achieve to qualify for bonus pay?