Please explain in details how I can solve part b

Diana has a car Whose value is $40K. The probability of an accident is 10% and she will lose the car at occurrence of the accident. Diana has wealth of $20K aside from the car, and her utility over wealth is given by u (w) = -w'2 (where w is measured in thousands). (b) What is the highut premium that Diana is willing to pay for the full insurance? What is the expected prot for the insurance company if the premium is this value you calculated