Tasks on analytical geometry?

a) length of the vector v (corresponds to the travelled in a s)
then convert the speed in m/s to km/h

b) Set straight line equation with parameter t, P1 as the support point vector v as the direction vector
Parameters in s

after 2 min = 120s therefore insert 120 for the parameter and add the two vectors, then you have the point after 2 min

c) Point sample: Use P2 as an x vector and see if it is on the straight line. For 0 < <1 <1: