Will this help me lose weight?

So I'm 170cm 76kgs I want to lose weight really badly for summer so I'm starting small I wanna lose 6kg in 4weeks but walking 30mins everyday plus 10squats/crunches/star jumps everyday and I will have wholegrain toast and milk for brekkie during the day I will have corn thins w tomato and cheese(just enuf for calcium) a sandwhich 1 piece of fruit and a green tea and for dinner (my mum cooks so I don't have a say but we always have a variety of veg/carbs/meats etc.

Do you think it will work?
Will this help me lose weight?
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