Q1 (6%). x = [5, -3, -1, 2] is a 4-dimensional vector. Calculate the following values: 1. the squared 42-norm of x: 2. the l1-norm of x: | |x| |1 = 3. the inner product of x and a, where a = [4, -2, 6, -1]]: ax = Q2 (4%). The matrix A E R2x3 and vector b E Rs are defined in the following: A = - 2 -4 and b Caculate the following values: 1. the matrix-vector product: Ab = 2. the matrix-matrix product: AAT =