For each of the following cases, find the complex power, the average power, and thereactive power: \text { (a) } v(t)=112 \cos (\omega t+10) \mathrm{V}, i(t)=4 \cos (\omega t-50) \mathrm{A} \text { (b) } v(t)=160 \cos (377 t) \mathrm{V}, i(t)=4 \cos (377 t+45) \mathrm{A} \begin{array}{ll} \text { (c) } \mathbf{V}=80 & 60 \mathrm{~V} \mathrm{rms}, \mathrm{Z}=50 & 30 \end{array} \begin{array}{l} \text { (d) } \mathbf{I}=1060 \text { A rms, } \mathbf{Z}=100 \text { 45 } \end{array}

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