please answer all i only have 30 mins

SLM: A construction company decided to purchase a concrete mixer truck for $75,000 with a trade-in of their old mixer. The old mixer has a trade-in value of $7,000. The new mixer will be kept for 15 years before being sold. Its estimated salvage value at that time is expected to be $5,000. Assume interest to be 12%. Determine the 10th year BVB by Straight Line Method. QUESTION 2 DDBM: A construction company decided to purchase a concrete mixer truck for $75,000 with a trade-in of their old mixer. The old mixer has a trade-in value of $7,000. The new mixer will be kept for 15 years before being sold. Its estimated salvage value at that time is expected to be $5,000. Assume interest to be 12%. Determine the 6th year BVB by Double Declining Balance Method (round-off k to 4 decimal places). QUESTION 3 DBM: A construction company decided to purchase a concrete mixer truck for $75,000 with a trade-in of their old mixer. The old mixer has a trade-in value of $7,000. The new mixer will be kept for 15 years before being sold. Its estimated salvage value at that time is expected to be $5.000. Assume interest to be 12%. Determine the 10th year BVB by Declining Balance Method (round-off k to 4 decimal places)