5.11. Convert the proof of Proposition 5.18 into an algorithm and use it to write each of the following numbers n as a sum of positive and negative powers of 2 with at most ½ [log n] + 1 nonzero terms. Compare the number of nonzero terms in the binary expansion of n with the number of nonzero terms in the ternary expansion of n. (a) 349. (b) 9337. (c) 38728. (d) 8379483273489.

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Q: 12. Find a normal vector n and an equation for the planes in Figures & (A)-(C).

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A: