Answer:
Entering text.
Editing text.
Formatting paragraph.
Formatting page style.
Importing text, graphics and images.
Entering mathematical symbols.
Checking spelling and grammar.
Header and footer and other.
Assuming decoders with enabler.
input with rectangle is the ENABLE input.
wire with "/" on it is a bundled wire with multiple values to save drawing space.
In1 is MSB, In5 is LSB.
messy drawing as I'm in vehicle.
Answer:
70 is the answer negative one begins from 83 and count down to 89, Therefore, 70 is is -4 and is chosen as the best answer