Progressor Komov (the hero of the Strugatskys) makes an interstellar journey on a starship. On the day he turned 30 and the spaceship was near the planet Pandora, he sent a light signal to Earth. The signal was received on Earth after 12.5 years. When Komov turned 45 years old, and the spaceship was again near the planet Pandora, the progressor received a signal reflected from the Earth. Calculate the speed of the starship V0. The clocks of the starship and the Earth are synchronized at the moment the signal is sent. The speed of the Earth is relative

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