momentum, 60 steps:  loss = 0.005930    w1 = −2.6398  b1 = −4.6398  w2 = 0.2008  b2 = 1.9230
plain SGD, 30 steps: loss ≈ 0.000000    w1 =  1.2415  b1 = −0.7585  w2 = 2.6270  b2 = 0.7313