A block of mass 1.16 kg is placed on a frictionless floor and initially pushed northward, whereupon it begins sliding with a constant speed of 3.13 m/s. It eventually collides with a second, stationary block, of mass 4.58 kg, head-on, and rebounds back to the south. The collision is 100% elastic. What will be the speeds of the 1.16-kg and 4.58-kg blocks, respectively, after this collision?
a. 1.27 m/s and 1.86 m/s
b. 1.85 m/s and 1.57 m/s
c. 0.93 m/s and 1.72 m/s
d. 1.86 m/s and 1.27 m/s

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