Which of these is the scalar projection of a⃗=⟨1,1⟩\vec{a} = \langle 1, 1 \ranglea=⟨1,1⟩ onto b⃗=⟨1,0⟩\vec{b} = \langle 1, 0 \rangleb=⟨1,0⟩?
111
000
2\sqrt{2}2
0.50.50.5