Which answers are correct about ALU (arithmetic logic unit)?

Question

Mathematics

With explanations, please, I searched on the Internet, but everything is not right, if you find it, also send a link where it is said about this, thanks in advance. I hope I correctly conveyed the meaning of the question, as I translated from a language that I do not know very well.
1) ALU multiplication requires at least:
16 bits
64 bits
32 bits
128 bits
to have a capacity of two words.
The latter is obtained, since the "words" can be of different lengths and occupy a different number of bits, respectively, for multiplication, a different number of bits will be needed.
2) In the event of an overflow, the ALU should display:
Error
Exception and abort
Interrupt
Overflow
Exception
Impossible value
3) The underflow situation is less of a problem than overflow because the result is approximated with sufficient accuracy to 0.
True
False

Answer 1

1 question is bullshit. Alu works as it was designed by Intel 4004