Vector F = 17 and is in quadrant 3 and thetaF= 30

Question

What is the component of i along F?
What is the component of F along i?

Answer 1

recall that the projection of a onto b is a•b/|b|
Not quite sure what "thetaF" is supposed to mean.
a•b = |a| |b| cosθ

Answer 2

but what is i? because i isn't given in the problem the vectors that are given is A,B,C,F and for this problem it focuses on vector F but what is i

Answer 3

thetaF is 30 degrees

Answer 4

i is the unit vector in the +x direction -- you know: i,j,k are the three basis vectors in 3D