$1.$ Creating vectors

a$)$ Create a vector, x$,$ to contain the values of $\{116,216,218,219\},$ and display values in x$.$

b$)$ Create a vector, y$,$ to contain a sequence of values from $10$ to $24$ by increment of $2$;

then display values in y$.$

c$)$ Create a vector, z$,$ that repeats the numbers $2$ to $5$ three times, and display values in z$.$

d$)$ Create a vector, w$,$ that contains words $$good$$better$$best$,$ and display values in w$.$

$2.$ Create a matrix:

a$)3$ rows and $2$ columns as the following matrix

$123122342334534$

b$)$ Show the value in the third row and second column using techniques for subscripting matrices. $($other methods will not receive marks$)$

c$)$ Calculate the mean of the first column.

d$)$ Calculate the standard deviation of the third row.