this is the question:

Of the cars sold at Murray’s Motors during the month of July,

- 90 had heated seats
- 100 had GPS
- 75 had satellite radio
- 5 had all three of these extras
- 20 had none of these extras
- 20 had only heated seats
- 60 had only GPS
- 30 had only satellite radio
- 10 had both GPS and satellite radio
- How many cars had both satellite radio and heated seats?
- How many had both GPS and heated seats?
- How many had neither satellite radio nor GPS?
- How many had GPS or heated seats or both?
- How many cars were sold in July?

i need to draw a venn diagram of this and show the work i did. i am so confused on how to do this please help