Rewrite the following if-else statements as statements that use the conditional operator. 

a) if (x > y)
 z = 1;
else
 z = 20;

b) if (temp > 45)
 population = base * 10;
else
 population = base * 2;

c) if (hours > 40)
 wages *= 1.5;
else
 wages *= 1;

d) if (result >= 0)
 System.out.println("The result is positive.");
else
 System.out.println("The result is negative.");