$2\mathrm{.}12$

a$.$ Create an evenly spaced vector of values from $1$ to $20$ in increments of $1.$

b$.$ Create a vector of values from $0$ to $2$ in increments of $\frac{}{10}.$

c$.$ Create a vector containing $15$ values, evenly spaced between $4$ and $20.($HINT: Use the linspace command. If you can't remember the syntax, type help linspace.$)$

d$.$ Create a vector containing $10$ values, spaced logarithmically between $10$ and $1000.($HINT: Use the logspace command.$)$