Define matrices (2-d arrays)

Define the following matrices:

m1 = `3×4` matrix of zeroes
m2 = the `3×3` matrix where row1`=(1,2,0)`, row2`=(2,5,-1)`, row3`=(4,10,-1)`
m3 = transpose of m2
m4 = dot product of m2 and m3
m5 = sum of m2 and m3
m6 = elementwise product of m2 and m3
m7 = matrix inverse of m2
m8 = the `5×5` identity matrix

`matrix m1 3 4
m2 = [[1;2;4];[2;5;10];[0;-1;-1]]
m3 = <-m2
m4 = m2<>m3
m5 = m2 + m3
m6 = m2*m3
m7 = inverse(m2)
m8 = identity(5)
`

Define vectors (1-d arrays)
Add and plot vectors