Suppose an employee's initial salary is $30,000. 

(a) If this person receives a $2000 raise for each year of experience, determine a sequence that gives the salary at the beginning of the nth year. What type of sequence is this? 

(b) Suppose another employee has the same starting salary and receives a 5% raise after each year. Find a sequence that computes the salary at the beginning of the nth year. What type of sequence is this? 

(c) Which salary is higher at the beginning of the 10th year and the 20th year? 

(d) Graph both sequences in the same viewing rectangle. Compare the two salaries.