Hi Divya, Losing 5 kilos is a month would be a lil unhealthy. According to WHO, ideally 2-2.5 kg weight loss is recommended. Quick weight with low calorie or crash diet is not recommended. The faster you lose, greater is the rebound tendency. Keep a practical target of 0.5 kilo/ week. As for the diet, find a link where you would find a sample weight loss diet. This would give you an idea on the portion control and food time management.
http://www.lifemojo.com/lifestyle/1200-calorie-north-indian-diet-plan-for-weight-loss-147140691For exercises, do some resistance exercises like Crunches, Reverse crunches, Lunges, Push ups, etc for atleast 30 min - 3/week and do some cardio activities like running, jogging, Brisk walking, cycling, etc for atleast 45 min - 4/week so as to get better results.