For a set of Laplace transforms, determine the time-domain Inverse-Laplace-Transforms using partial-fraction expansion and/or L.T. properties and/or L.T. tables \text { a) } F(s)=\frac{1}{s^{2}+4} \text { b) } G(s)=\frac{2}{s^{2}-2 s+2} \text { c) } H(s)=\frac{1}{s^{2}+2 s+1}

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