Implement a 4-bit counter using the LEDs (You do not need the switches for this exercise). The count value should update approximately every 1 second. Use the BTN0 and BTN1 push buttons on the ZYBO Z7-10 board to control the direction of the count. For example, when the BTN0 button is pressed, the counter should count up. Likewise when the button BTN1 is pressed, the counter should count down. When neither button is pressed, the count should remain the same. Demonstrate this operation to the TA upon completion.

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.