currently at (1, 1, 1). (a) In what direction should he proceed in order to decrease the temperature most rapidly? (b) If the ship travels at eº meters per second, how fast (in degrees per second) will the temperature decrease if he proceeds in that direction? degrees/sec (c) Unfortunately, the metal of the hull will crack if cooled at a rate greater than √17e³ degrees per second. Describe the set of possible directions in which he may proceed to bring the temperature down at no more than that rate. + bj + ck a² + b² + c²= 1,0 < S 5 √17e³}

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