A Study to Evaluate the Effect of Fasting Duration and Tirzepatide Withholding on the Amount of Food and Fluid in the Stomach in Participants With Type 2 Diabetes Mellitus and Participants With Overweight or Obesity Without Type 2 Diabetes Mellitus

Percentage of Participants with Lack of Gastric Content Retention Post-Liquid Test Meal

Time frame: Day 178 (at 6, 8, 12, 18 and 24 hours after Day 177 liquid test meal)

Amount of Gastric Content Volume Post-Liquid Test Meal

Time frame: Day 178 (at 6, 8, 12, 18 and 24 hours after Day 177 liquid test meal)

Amount of Gastric Content Volume Post-Solid Test Meal

Time frame: Baseline, Day 171 (at 6, 8, 12, 18 and 24 hours after baseline or Day 170 solid test meal)

Percentage of Participants with Lack of Gastric Content Retention Post-Solid Test Meal After Discontinuation of Tirzepatide

Time frame: Baseline through 8 days after discontinuation of tirzepatide at 6, 8, 12,18 and 24 hours

Percentage of Participants with Grades 0, 1, and 2 from Antrum Grading Scale Post-Solid Test Meal

Time frame: Baseline, Day 171 (at 6, 8, 12, 18 and 24 hours after baseline or Day 170 solid test meal)

Percentage of Participants with Grades 0, 1, and 2 from Antrum Grading Scale Post-Liquid Test Meal

Time frame: Day 178 (at 6, 8, 12, 18 and 24 hours after Day 177 liquid test meal)]

Percentage of Participants with Grades 0, 1, and 2 from Antrum Grading Scale After Discontinuation of Tirzepatide

Time frame: Baseline through 8 days after discontinuation of tirzepatide at 6, 8, 12,18 and 24 hours