What is the size in bits of the Color datatype in C#?

What is displayed in the MessageBox window if the following code is executed?

int grade = 72;
if (grade >=80) 
{
    MessageBox.Show("A"); 
}
else if (grade >=70) 
{ 
    MessageBox.Show("B"); 
}
else if (grade >=60) 
{ 
    MessageBox.Show("C"); 
}
else if (grade >=50) 
{ 
    MessageBox.Show("D"); 
}
else 
{ 
    MessageBox.Show("F"); 
}

What value does integer x have after the statement "x = 2 + 12 / (3 +3 )"?

What is displayed in the MessageBox window if the following code is executed?

int temp = 90;
if (!(temp > 90))
{
    MessageBox.Show("cold");
}
else
{
    MessageBox.Show("hot");
}

What value does string s have after these statements:

string a="10"; 
int b=10; 
string s = a + b.ToString();

Which is the expression that means “size is equal to width or size is equal to height” in C#?

Which is an illogical expression?

The integer variable y has value 4.  What of the following statements could not have caused this?