Assign number `1` for least to `4` for most to indicate the relative base strength of the following

Assign number `1` for least to `4` for most to indicate the relative base strength of the following `{:(I,,II),(C_(6)H_(5)NH_(2),,p-NO_(2)C_(6)H_(4)NH_(2)),(III,,IV),(m-NO_(2)C_(6)H_(4)NH_(2),,p-CH_(3)OC_(6)H_(4)NH_(2)):}`

following