Can s/o please help me these 2 questions? Thanks

1. [-/1 Points] DETAILS SERPSE10 14.8.OP.030.BIO. MY NOTES ASK YOUR TEACHER In the movie The Martian (20th Century Fox, 2015), an astronaut and botanist stranded on Mars decide to plant potatoes in fertilized Martian soil in order to survive until a rescue mission is underway. (a) From Newton's law of universal gravitation and the data in the endpapers of this textbook, calculate the acceleration due to gravity on the surface of Mars (in m/s2). 1 m / s 2 (b) Studies have shown that the principal limiting factor in how high plants can grow is the ability to elevate water to the highest parts of the plant. If we model the vascular system of the potato as a long, straight tube extending from the tuber root (the potato) to the top of the stem, then the flow of water in this tube can be modeled using the Hagen-Poiseuille equation relating the volume flow rate Iy to the radius of the tube r. IV = ( Tir 4 ) AP 8n where n is the viscosity of the liquid, L is the length of the tube, and AP is the difference in pressure between the top and bottom of the tube. If the only factor determining how high plants can grow is the transport of water, would the length of the stems of potatoes grown on Mars be longer or shorter than those grown on Earth? Explain your reasoning. The length of the the plant stems would be longer on Mars because the acceleration due to gravity on Mars is less than that on Earth. The length of the the plant stems would be shorter on Mars because the acceleration due to gravity on Mars is greater than that on Earth. The length of the the plant stems would be longer on Mars because the acceleration due to gravity on Mars is greater than that on Earth. The length of the the plant stems would be shorter on Mars because the acceleration due to gravity on Mars is less than that on Earth. The length of the plant stems would be the same on Mars or on Earth since the volume flow rate is independent of acceleration due to gravity