What is the coordinate vector of v=(1,2)v = (1, 2)v=(1,2) with respect to the basis B={(1,1),(1,0)}B = \{(1, 1), (1, 0)\}B={(1,1),(1,0)}?
(1,1)(1, 1)(1,1)
(2,−1)(2, -1)(2,−1)
(2,1)(2, 1)(2,1)
(1,2)(1, 2)(1,2)