### Pre-Lab Assignment: Lab 6      Name ___________________________________

1. Rewrite the following cascading if statement to a switch statement.
```System.out.println("Enter size box you want");
int boxSize = scan.nextInt();
double price;
if (boxSize == 10)
{
System.out.println("Small");
price = 2.5;
}
else if (boxSize == 20)
{
System.out.println("Medium");
price = 3.75;
}
else if (boxSize == 30)
{
System.out.println("Large");
price = 5.0;
}
else
{
System.out.println ("Not a valid size.");
price = -1;
}

```

2. Fix the following code fragment.
```if(total == MAX)
if(total < sum)
System.out.println("total == MAX and sum total < sum");
else
System.out.println("total is not equal to MAX");

```

3. Rewrite each condition below in valid Java syntax (give a boolean expression):
1. x > y > z

2. neither x nor y is equal to 0

3. both x and y are equal to 0

4. x is greater than y but less than z

4. Use the laws of logic to write a Java expression equivalent to the following without using the not (!) operator.
```          ! (age >= 65 && income < 20000)

```
5. Use truth tables to determine whether each pair of expressions is equivalent.
1. NOT q OR p
p OR NOT(q OR p)
```

```

2. (p AND r) OR (q AND NOT r)
(p AND q AND NOT r)
```

```