Question 7

The steps 2 and 3 of the algorithm should be switched to make the algorithm successful.

Switching steps 2 and 3 in the algorithm will ensure that the needed materials are determined before purchasing them, thus preventing unnecessary purchases and ensuring all required supplies are obtained.

A) 1 and 2

Switching steps 1 and 2 would not improve the algorithm because measuring and marking the lumber cuts should logically precede buying materials. If materials are purchased before determining what is needed, it could lead to incorrect or excess purchases.

B) 2 and 3

Switching steps 2 and 3 allows for a logical flow in the algorithm. Determining the needed materials first ensures that the correct items are bought, which is essential for the successful assembly of the picnic table.

C) 3 and 4

Switching steps 3 and 4 is not beneficial because determining the needed materials must occur prior to cutting the lumber. If the materials are cut without knowing what is necessary, it could result in wasted time and resources.

D) 1 and 3

Switching steps 1 and 3 would disrupt the logical sequence of the algorithm. Measuring and marking cuts should happen after determining the needed materials to ensure that the correct dimensions are used, thus making this option ineffective.

Conclusion

In conclusion, the correct answer is B, as switching steps 2 and 3 enhances the algorithm's efficiency by ensuring that materials are accurately determined before purchasing. This prevents errors and mismanagement of resources, while all other options fail to maintain a proper logical sequence in the construction process.