1. zorba and English mastiff with a mass of 155 kg jumps forward horizontally at a speed of 6 m/s into a boat that is floating at rest. after the jump the boat and zobra move with a velocity of 2.2 m/s forward. calculate the boats mass2.In a distribution with a standard deviation of eight an individual score of 42 corresponds to a Z score of -0.5. What is the mean of this distribution?3.The distribution of SAT scores is normal with u=500 and o= 100a. What SAT score X value separate the top 15% of the distribution from the rest?b. What SAT score X value separates the top 10% of the distribution from the rest?c. What SAT score X value separates the top 2% of the distribution from the rest?