What are the mean median mode and range of the days that given the altitude of weeks and feet -12 -9 -1439 -4949 -18 and -43

Mean = -1078.33333
Median = -30.5
There is no mode available for these numbers :(

The academic affairs council is the highest expert body processing academic affairs, as stipulated by the university statutes. specialist aaro häkkinen (educational policy) took part in the council’s meeting. the agenda of the meeting included bachelors’ feedback, the timing of pedagogical studies, the grant system for tuition fees, the standardisation of administrative practices for internships and the situation of foreign-language and multilingual master’s programmes.