The following table shows the percentage of marks obtained by seven students in six different subjects in an examination.

Student	Maths	Chemistry	Physics	Geography	History	Computer Science
	Maximum Marks = 150	Maximum Marks = 130	Maximum Marks = 120	Maximum Marks = 100	Maximum Marks = 110	Maximum Marks = 90
Ankit	100	80	80	40	70	70
Aman	90	50	90	60	90	80
Ayush	80	65	70	70	80	80
Rohit	90	60	80	95	60	60
Tanvi	80	65	65	80	40	60
Tarun	70	75	85	77	50	90
Muskan	65	35	50	85	80	80

What are the average marks obtained by all the seven students in Physics? (Rounded off to two digits after the decimal)