Question 3,4,5 were the doubts

#1

it would be helpful if I can get the solution and the explanation to the solution for the question no. 3,4,5 in the quiz.
Confused whit what signed is and how can we use signed x=1 instead of signed int x=1 or using signed and unsigned with char

#2

signed/unsigned comes with default int, so it is not required to put int explicitly,
also line like:
signed a = ‘A’;
initializes a with ASCII value of ‘A’ which is integer type only!

#3

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