Two electronics technicians are looking at the representations of a silver atom and a copper atom in the figure above. technician a says that silver and copper are both good conductors because their atoms have single electrons in their outermost orbits. technician b says that silver is a better conductor than copper because the silver atom's free electron is farther from its nucleus than the copper atom's free electron is from its nucleus. which of the following statements is correct?

a. neither of the two technicians is correct.
b. both technician a and technician b are correct.
c. only technician b is correct.
d. only technician a is correct.

Write a new lc-3 trap subroutine (i. e. a subroutine that will be invoked via the trap instruction) that will receive a numeric digit entered at the keyboard (i. e. an ascii character), echo it to the screen, and return in r0 the corresponding numeric value: so if the user types the digit '7', the character '7' will appear on the screen, but the value returned in r0 will be b0000 0000 0000 0111 (#7) you may not use any trap calls in your code - you must implement the "polling" code that interrogates the keyboard status and data registers. ; getnum_tsr ; a subroutine for obtaining a numeric value ; given ascii numeric digit input to keyboard. ; the numeric digit is echoed to the console (e. g. '7' = b0000 0000 0011 0111), ; but the value returned in r0 is the actual numeric value ; corresponding to the digit (e. g. b0000 0000 0000 0111 =