Answer
The picture is attached below.
The hydrogen atoms shown in purple are all primary.
The hydrogen atom shown in black is tertiary.
Work Step by Step
The middle carbon atom has one hydrogen (shown in black). Thus hydrogen is bonded to a carbon that is bonded to 3 R groups (Methyl groups). This hydrogen is therefore tertiary.
The rest of the carbon atoms are bonded to 3 hydrogen atoms (shown in purple). These hydrogen atoms are bonded to a carbon atom that is bonded to 1 R group. These hydrogens are therefore primary.
