Sir please help me to solve below contract costing problem

(d) Consider following information provided to you about a contract:

Costs incurred to date 5,424
Costs estimated to complete contract 1,356
Value of work certified to date 6,035
Total value of contract 7,100
1. Calculate the total expected contract profit.

2. Calculate the attributable profit using costs as a measure of completion.

3. Calculate the attributable profit using sales value as a measure of completion.