Problem $2\mathrm{.}1$

$*$ abc$1234($HEAD $->$ main$)$ Merge branch 'feature$-$x$\text{'}$

$|\backslash$

$|*$ def$5678($feature$-$x$)$ Implement feature X

$*|$ ghi$9012$ Update main branch

$|/$

$*$ jkl$3456$ Common ancestor

Questions:

$1.$ What type of merge has occurred here? $$ split merge

$2.$ How can you tell? $$ The main branch splits

$3.$ What was the state of the main branch when feature$-$x was created? $$