The interfacing circuit of your Launchpad to a LED is shown below. When the pin of Launchpad connecting the 7405 gate outputs high, the other end of the 7405 gate is measured to be 0.5 V, and the LED will be turned on. Now suppose the desired current through the LED is 0.012 A and the desired power of the LED is 0.024 Watts. Determine the value of R. +3.3VJ R3 TM4C V LED Out 7105 450 Ohms 66.7 Ohms 50 Ohms 45 Ohms