In this project, you will be adding an interrupt service routine (isr) to an existing program. the program is already fully functional hexadecimal counter that shows the current counter value on the seven-segment display. you will use the timer to generate an interrupt every x cycles (where x can be between 100 and 200 cycles). your isr needs to do the following things: 1. toggle all eight leds (i. e. if they are all off, they should all be turned on and if they are already on, turn them off) 2. perform any tasks necessary to allow another timer interrupt within 100 to 200 cycles no changes should be made to the existing main loop or sseg_display. asm. code should only be added following the todo comments.

code in main:

jal sseg_display
nop
addiu $a0, $a0, 1
j main
nop

Which of the following “invisible” marks represents an inserted tab?

Write the command that can be used to answer the following questions. (hint: try each out on the system to check your results.) a. find all files on the system that have the word test" as part of their filename. b. search the path variable for the pathname to the awk command. c. find all files in the /usr directory and subdirectories that are larger than 50 kilobytes in size. d. find all files in the /usr directory and subdirectories that are less than 70 kilobytes in size. e. find all files in the / directory and subdirectories that are symbolic links. f. find all files in the /var directory and subdirectories that were accessed less than 60 minutes ago. g. find all files in the /var directory and subdirectories that were accessed less than six days ago. h. find all files in the /home directory and subdirectories that are empty. i. find all files in the /etc directory and subdirectories that are owned by the group bin."

How many nibbles can be stored in a 16-bit word?