Write the following using for loop and then using while loop

1. Add the numbers in a list x = [1, 3, 5, 7]

2. Output the even numbers from the list x = [1, 3, 5, 6, 8, 9]


3. Solve the following:
Given two students' test scores
scores = [ [100, 90, 50], [50, 50, 100] ]
calculate the average (using a loop (for or while) with Python tools you have.

Your answer should work for any list of two students' test scores -- three 
test scores per student.

The answer should be in the format:
 [ 80, 66.6666666667 ]  or [ [ 80 ], [ 66.666666667 ] ]
 
The average test score of a student with three scores S1, S2, S3 is
 1/3 * ( SUM (from i = 1 to 3) Si )

4. Solve the following
A client is tracking daily nutrition/aerobic values. At 5pm, he wants to know
how many calories he can have for dinner.
So far in the day, he has consumed the following calories:
   [ 300, 450, 180 ]		# breakfast, lunch, snack

So far in the day, he has done 20 minutes of aerobics for 200 calories
	[ 10, 5, 5 ]			# three periods of aerobics at 10 calories / minute
	
He has a daily limit of 2000 calories.

How many calories can he have for dinner?


5.  Repeat #3, with the added specification (spec) that you don't know ahead of
time how many meals the client has consumed so far and you don't know ahead of
time how many aerobic 'work-outs' the client has done.