discrete math

Let C_1 be the binary linear code whose parity-check matrix is H_1 = [1 1 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 1 0 1] What are the parameters n, k, d of C_1? Find a generator matrix G_1 for C_1