47. (a) eo = target value - computed value = 0 - 1 = -1
er = eo*wro = (-1)*(-0.9) = 0.9
es = eo*wso = (-1)*(1.6) = -1.6
(b) newwro = oldwro + eo*Ar = -0.9 + (-1)*(1) = -1.9
newwso = oldwso + eo*As = 1.6 + (-1)*(1) = 0.6
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