A science communicator is creating a vector visualization for a YouTube video and needs to find a vector \(\mathbfv = eginbmatrix a \ b \endbmatrix\) such that \(\mathbfv imes \mathbfa = 5\), where \(\mathbfa = eginbmatrix 3 \ -4 \endbmatrix\) and cross product in 2D is defined as \(\mathbfv imes \mathbfa = a_1b_2 - a_2b_1\). - Portal da Acústica