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4. (12 points) (a) (4 points) Let x[n] = {1,2, 1, 2} and h[n] = {1,-1,1, -1} be two length-4 sequences defined for 0 <n<3. De

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(a) x (ni= {1, 2, 1, 2} hens = {1,-1), 1} NE4 Given sequence acn) and ning are curapped around a circle in counter clockwiseThen rotating hing in counter clockwise nen) 2 1-2 nao! - 2 - =3 BE =3 y(3) = 2(1) + 16-1) + 2(1) 41(-1) = 2 1 - NEO :. yn) =X(3) = { xend e-Sopin zite eiset je-j 34 +2enjem z it 2195 + 11-13 + 22-j) no me e a mano Xek) = { 6,0, -2,0) → heni= {1,-1,nao Hig) e nens ejff3n Ele + feest (234fc-vsejen 1 - - 1 tj -0 • HCK) = { 0, 0, 4,07 > H2O) = {-1, 9-1, + N 4 Y(K) = yems e-pno ¥13 ) = Ê yen) e-*3n 2 -2 +22353 #2)-37572 000 = -2 +27 +2 -2; .: Y(K) = { 0,0,-8,0} (0) YDERT 2(k) z X (K? H[K] XFK1{ 6:: (610-u4o ماج کليه - ا د- نهم (ع) و في = ۹۱ 03. الهه (+ 40ه) ا اء ( = دے (k= 4 = (2) - 08 (لائی - 2040 = -: ا :: إذ نے (اه

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