Q$2-$ String Manipulations $(0\mathrm{.}75$ points$)$

Using the strings provided, concatenate them together into the string Python is fun! $.$ Save this result to a variable called str$\_$fun $.$

Do the same, but concatenate to generate the string Python is really fun! $.$ Save this result to a variable str$\_$really$\_$fun $.$

Note: make sure to add spaces between words when concatenating together.

$[]$: # These variables provided for you

str$\_1=$ 'Python'

str$\_2=\text{'}$is$\text{'}$

str$\_3=$ 'really'

str$\_4=$ 'fun!$\text{'}$