hi, i need answer on the questions below. please provide explanation or solution if needed so i can better understand it. thank youu!

7. The motion of a bicycle rider moving in a straight line is shown in the graph below. After 12 seconds, how far is the bicycle rider from his original starting point? Velocity (mis] -10 10 Time (s) A. 0 m B. 10 m C. 47 m D. 74 m E. No Answer9. Please refer to the following vectors: A = 6i + 2j - 3k B = 31 - j - 2k C = -i+ j - 4k D = j - 3k E =-i+ 2k F =-5k G = 2i H =-3j 1 =-4i +4j A man went into hiking and traveled with the following displacement vectors: B, C, H, I. Find the resultant displacement: A. -20i -12j +15k B. -21 -7j -6k C. +11i -11j-6k D.+5i +15j -20k E. No Answer10. A ball is moving along a circular track. What can be said about the orientation of the velocity and acceleration vectors? A. Parallel B. Anti-parallel C. Perpendicular D. Out of phase by 180 degrees E. No Answer 11. Please refer to the following vectors A = 6i + 2j - 3k B = 3i - j - 2k C =-it j - 4k D = j - 3k E=-i+ 2k F =-5k G = 2i H = -3j 1 = -4i +4j Solve 4(D x 1) + 3(E x C) + 2F + 5H A. -401 -69j -30k B. -671-32j-16k C. -84i -91j +71k D. -54i +24j +3k E. No Answer12. For bodies that are falling, to achieve terminal velocity, what must happen to the acceleration of the body? a. The acceleration of the body is remains the same through time. b. The acceleration of the body must decrease over time c. The acceleration of the body must equal to the acceleration due to gravity. d. The acceleration of the body must increase over time. No Answer 13. In an intersection, a bus moving at (100i) m/s and a truck moving at (200j) m/s collided with each other. Assuming that the two objects have the same mass, what would be their final speed together? Note: i and j are unit vectors A. 300 m/s B. 173.21 m/s C. 100 m/s D. 223.61 m/s E. No