24. A cylinder of unknown material has a length of 1 cm and a diameter of 2 cm. The resistance of the cylinder is 2592. What is the resistivity of the unknown material? 25. 26. Suppose you are able to uniformly stretch the cylinder to a length of 2 cm and that its diameter becomes 0.25 cm. How much is the resistance, in comparison to R = 250?? How much is the resistance (in comparison to R = 2502) if you cut the original cylin- der in half lengthwise (that is, cut it into two pieces having length 0.5 cm and diameter 2 cm)?