To solve this question, we have to draw the structural formula of 3-heptene.
However, we can take into coginizance some steps used to name organic compounds in this case. This would simply put us in the right direction.
Step one
Draw a 7 carbon chain structure
Step two
Identify the 3rd carbon and insert the double bond in between
Step 3
Complete the structure by adding hydrogen where necessary. Always remember the valency of C and the remaining number of site left for bonding.
The diagram above is the structural formula of 3-heptene
