***Please explain your answers in detail***

E-Walk, Inc. has the following net Section 1231 gains and losses:

2014: $12,000 gain 2017: $16,000 gain

2015: $6,000 loss 2018: $8,000 loss

2016: $25,000 loss 2019: $30,000 gain

For each year, what is the character and amount of the Section 1231 gain (loss) for tax purposes?