6b The spaceship turns on its engine. What minimum speed V must it achieve to escape the gravitational attraction of the four planets? SQ'}I A steel string is 1n1 long and weighs 50gm. The string is fixed at both ends and standing waves are set up in it. The fundamental frequency of oscillation of the string is SUUHZ. Find the speed of the wave in the string and the tension in the string. (7 points)