Answer:
The trader B's net position in the contract at the end of the day is 5 long position contract
Step-by-step explanation:
The computation of net position for the trader B is shown below:
Net position = Long position - short position
= 10 long position contracts - 5 short position contracts
= 5 long position contract
The other traders are irrelevant because we have to find out the net income for traders B only. Hence, all other information is ignored