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====== homework 4 ====== ex 24.3, 26.2, 27.4, 27.5, due Friday Nov 12. ===== tips ===== **ex 24.3:** Use the matlab ''expm'' function to compute the matrix exponential. You don't need to turn in ten plots of ''||e^(tA)||'' versus ''t'', for ten different matrices, just a few that illustrate the main cases worth commenting about. **ex 26.2:** The