$2\mathrm{.}6$ Use the NumPy $1$ inspace function to create vectors equivalent to the following Python statements:

$($a$)$ np$.$arange $(4,35,6)$

$($b$)$ np$.$arange $(-4,2)$

$2\mathrm{.}7$ Use NumPy's a range function to create vectors identical to the

$y$

following created with the $1$ inspace function:

$($a$)np.l$ inspace $(-2,1\mathrm{.}5,8)$

$($b$)$ np$.1$ inspace $(8,4\mathrm{.}5,8)$

$2\mathrm{.}8$ The NumPy function, $1$ inspace $(a,b,n),$ generates an array of $n$ equally spaced points between a and $b.$ Describe the arange function that will generate the same result. Test your formulation for $a=-3,b=5,$ and $n=6.$

$2\mathrm{.}9$ The following Python statements create a matrix A:

import numpy as np

a$1=$ np$.$matrix$(\text{'}($:$[\text{'},3,2,1{]}^{\text{'}}\}$

a$2=np.$ matrix $(np.$arange$(0,1,1,\mathrm{.}5))$

a$3=$ np$.$matrix $($np$.1$ inspace $(6,8,3)$

$A=np*vstack((a1,a2,a3))$

$($a$)$ Write out the resulting matrix.

$($b$)$ Write two distinct Python commands to matrix multiply the second row by the third column of $A.$ Confirm that these yield the same result, a scalar quantity.