1. Clean Code is code that is easy to read and understand. Code that someone else can come in and see what is happening as well as code that someone else can easily understand.

2. Similar to what was stated in the article where it says," ..provides a cautionary tale to all involved in safety-critical development...". There has been talk about automating airplanes to fly themselves and that is a scary thought, scarier than a self driving car. Yes there's alot of automation in flying an airplane but a crash in  an airplane is fatal. There is so much at risk that one bug can be the end of many lives. Older airplanes with their pneumatic parts yes they fail but the pilot can usually detect the malfunction and compensate. Any code that will affect peoples lives should always exceed standards.

3. This is not clean code because it is not self documenting, the variables could be better names and it does not pass the squint test. Better code would look like this:

FUNCTION do(temperature, type)

 IF type = "F" THEN
 	SET convertedTemperature to (temperature - 32) * (5/9)

 ELSE IF type = "C" THEN
 	SET convertedTemperature to temperture * 1.8000 + 32.00

 PRINT convertedTemperature
 END IF

END FUNCTION

4. Yes, I would consider this good code.

5. a.
 FUNCTION checkOutCustomer(subTotal, discountRate, paymentType)
   total = subTotal * discountRate + (subTotal * tax)

   PRINT "Your total due is: " + total

   IF paymentType = 'CASH' THEN

       CALL getPayment RETURNING amount

       PRINT "Change due: " + amount - total

   ELSE IF paymentType = 'CREDIT CARD' THEN

       CALL getPayment RETURNING amount

       PRINT "Your credit card has been charged: " + total

   END IF

END FUNCTION

  b.
FUNCTION checkoutBook(book, guest)

 FUNCTION isGuestInGoodStanding(guest)
  IF guest.accountActive THEN
   IF NOT(guest.hasOverdueBooks) THEN
     IF guest.outstandingFees = 0 THEN
        Return True
     END IF
   END IF
  End IF
  Return False
 END FUNCTION

 FUNCTION checkoutBook(book)
   IF isGuestinGoodSTanding(guest)
     APPEND book to guest.books
     SET book.status to "Checked Out"
     PRINT "Your books have been issued."
   ELSE

     PRINT "Unable to check out book."

 END IF

END FUNCTION

  c.
CLASS BankAccount

 FUNCTION displayBalance
    PRINT balance
 END FUNCTION

 FUNCTION deposit(amount)
    SET balance to balance + amount
 END FUNCTION

 FUNCTION withdraw(amount)
     IF balance > amount THEN
       SET balance to balance - amount
     END
 END FUNCTION

 FUNCTION creditCardOffer
     IF NOT(customer.hasCreditCard) THEN
         CALL offerCreditCard
     END
 END FUNCTION

 FUNCTION checkStatus
     IF NOT(customer.hasCheckingAccount) THEN
         CALL offerCheckingAccount
     END
 END FUNCTION

 ....
 ....
 ....

END

6. function isSquareRoot(arr) {
  var sum = 0;
  for(var i = 0; i < arr.length; i++) {
    sum += arr[i];
  }
    if(sum > 0 && Math.sqrt(sum) % 1 === 0)
      return Math.sqrt(sum);
    else
      return sum;

}

7. function isDuplicate(arr) {
  for(var i = 0; i < arr.length; i++) {
    for(var j = 1; j <arr.length; j++){
      if(arr[i] === arr[j]) {
        return false;
      }
    }
  }
  return true;
}


8. function isAnagram(string1, string2) {
  if(string1.length === string2.length) {
    var array1 = string1.split("");
    var array2 = string2.split("");

    secondArrayLetter = array2.length - 1;

    for(var i = 0; i< array1.length; i++){
      if(array1[i] === array2[secondArrayLetter]) {
        secondArrayLetter--;
      } else {
        return false;
      }
    }
    return true;
  }
  else {
    return false;
  }
}