1.Which of the following variable declarations are correct? If a variable declaration is not correct, give the reason(s) and provide the correct way to declare the variable.

a)Double conversion = 2.5;

b)Char grade = A+;

c)Double 28.5 = num

d)String message = First C++ course;

e)int myage = 18 years

f)int perfectsquare;

g)float x, y, decimal;