The spaceship shown in the figure below is traveling at a speed of 15,000 km/s to the left while it sends out a signal with a wavelength of 4 meters. 
If astronomers living on planets A and B measure the radio waves coming from the space ship, what wavelengths will they measure?
Definitions:
Directive Leadership
A leadership style where the leader takes a highly structured and authoritative role, making decisions unilaterally and expecting followers to comply.
Supportive Leadership
Leadership style focused on building trust and motivation among team members by showing concern for their needs and well-being.
Participative Leadership
A leadership style where decision-making is decentralized and employees at all levels are encouraged to contribute ideas and opinions.
Transactional Leadership
A leadership style focused on clear exchanges between leaders and followers, where accomplishment of tasks leads to rewards.
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