1. Categorise each of the following as continuous or discrete. The random variables are: (a) A is 'the age in completed years of the first person I see wearing a hat'. (b) B is 'the length of the next car to enter the car park'. (c) C is 'how many cows I will see before the first green one'. (d) D is 'the date next July of the day with the highest temperature'.