Can someone answer this question correctly it's my test please don't answer if you don't understand please show work I need it today thank you

Answer:
The answer is b.) -5.2 degrees
Step-by-step explanation:
to find the mean of this problem you have to add all numbers and then divide it by how many numbers there is.
so you have to add -42+ -17+14+-4+23 and that'll equal -26
so you take -26 and divide it by 5 because thats how many numbers their are to divide
-26 divided by 5 is (-5.2)