Hello All, I'm new here and to the getting 18 lbs off. I'm 38 female, 5'4 155lbs. I'd like to be 137lbs. I am changing my eating habits and portion size. I'm drinking 80oz of water a day. I have started walking 1.7 miles 5 days a week. Is walking 5 days a week enough to reach my goal or should I include other exercise?…