Hello, can you please help me with these questions? Thank you!

4. Determine the resultant of each combination of vectors.

a. 25 km/h north and 81 km/h east

b. 12 N on a bearing of 30 and 15 N on a bearing of 140

5. Determine the vertical and horizontal components of each force.

a. 810 N at an inclination of 75 clockwise from the horizontal.

b. 80 m/s, 60 counter clockwise from the horizontal.

11. Given the force, in Newtons, to be [15,12] for an object moving along the vector [7,3] in metres, find the work done.

13. Given the points A(3,5) and B( 3, 7), find

a. the vector equation of the line. b. the parametric equations of the line.

c. the symmetric equation of the line.

d. the scalar equation of the line.