Vector A has a negative x component 3.00 unit in length and a positive y component 2.00

Question:

Vector A has a negative x component 3.00 unit in length and a positive y component 2.00 units in length.
(a) Determine an expression for A in unit–vector notation.
(b) Determine the magnitude and direction of A.
(c) What vector B when added to a gives a resultant vector with no x component and a negative y component 4.00 units in length?