With regards to C++ programming

Given the following class, which of the statements concerning it are true? (5 marks) (a) The constructor on line 4 is the class's default constructor. (b) The constructor on line 4 makes use of in-class member initialisation. (c) The constructor on line 6 first default-initialises the variables a_,b_ and cand then assigns them values. (d) The following line of code auto a3=A{3,4}; results in a=3,b=4, and cc=1. (e) All of the constructors can be called without specifying a value for c