5. Which of the below sentences are propositions:
a) The sun rises in the East and sets in the West.
b) What time is it?
c) Go out and play.
d) 1+1 = 2
e) 'b' is a vowel.
f) x + 1 = 2.

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.