A 66 Kg engineer leaves her office on the 33rd floor of a skyscraper and takes an elevator up to the 59th floor. Later she descends to street level. The engineer takes the zero of potential energy at street level and the distance from one floor to the next is 3.5 m .

a) What is the engineer's potential energy in her office?

b) What is the engineer's potential energy on the 59th floor

Express your answer using two significant figures and (J) unit