Use export –n (Sobell, page 486) to unexport myvar. Show that myvar is a shell variable but is no longer in the environment.

A(n) ____________________ ordering of the vertices of the accompanying graph is 0, 1, 3, 4, 2, 5, 7, 8, 6, 9.

Fill in the blank(s) with the appropriate word(s).

A system always needs the 4-pin Auxiliary power connector, and sometimes needs the P1 connector as well.

a. true b. false