The image is the set of all points in $\mathbb{R}^4$ that you get by multiplying this matrix to points in $\mathbb{R}^5$, you can find these by checking the matrix on the standard basis. The kernel is the set of all points in $\mathbb{R}^5$ such that, multiplying this matrix with them gives the zero vector.
These seven companies alone have produced almost one-fifth (18.7 percent) of all industrial carbon released into the atmosphere since the dawn of the Industrial Revolution.
Feeding high temperature-high carbon DRI to the EAF, a single reduction unit of 1,500,000 ton/year can fulfill the production requirements of the largest single line mini-mill, producing up to 1,335,000 ton/year of slabs. Plants including multiple units can be designed for larger capacities.