Please help. hudcyhaoysidhczhociuskyalhcz (Sorry needed 20 characters)

Brook states that the distance on the line is 4 units. caleb states that the whole line does not have a distance because it continues on forever. vivian states that the line is 6 units long. which distance did brook measure? which distance did vivian measure?

Iwill give ! if m∠a=59 and m∠3=81°, what is m∠b? m∠b= _[blank]_°

Find cot x if sin x cot x csc x = √2