Read the given passage and answer questions number 1 to 5 that follow : In common system, an aliphatic amine is named by prefixing alkyl group to amine, i.e., alkylamine as one word (e.g., methylamine). In secondary and tertiary amines, when two or more groupsare the same, the prefix di or tri is appended before the name of alkyl group. In IUPAC system, primary amines are names as alkanamines. The name is derived by replacement of 'e' of alkane by the word amine. For example, CH_(3)NH_(2) is named as alkanamines. The name is derived by replacement of 'e' of alkane by the word amine. For example, CH_(3)NH_(2) is named as methanamine. In case, more than one amino group is present at different positions in the parent chain, their positions are specified by giving numbers to the carbon atoms bearing -NH_(2) groups and suitable prefix such as di, tri, etc., is attached to the amine. The letter 'e' of the suffix of the hydrocarbon part is retained. For example, H_(2)N-CH_(2)-CH_(2)-NH_(2) is named as ethane-1, 2-diamine. To name secondary and tertiary amines, we use locant N to designate substituent attached to a nitrogen atom. For example, CH_(3)NHCH_(2)CH_(3) is named as N-methylethanamine and (CH_(3)CH_(2))_(3)N is named as N, N-diethylethanamine. In arylamines, -NH_(2) group is directly attached to the benzene ring. C_(6)H_(5)NH_(2) is the simplest example of arylamine. In common system, it is known as aniline. It is also an accepted IUPAC name. While naming arylamines according to IUPAC system, suffix 'e' of arene is replaced by 'amine'. Thus in IUPAC system, C_(6)H_(5)-NH_(2) is named as benzenamine. Name the compound according to IUPAC system : ""CH_(3)-underset(underset(NH_(2))(|))(CH)-CH_(2)-CH_(2)-NH_(2)