Heater including a plurality of heat generation members, fixing apparatus, and image forming apparatus

A heater comprising:

• a first heat generation member;
• a second heat generation member;
• a third heat generation member having a length shorter than the first heat generation member and the second heat generation member in a longitudinal direction;
• a fourth heat generation member having a length shorter than the third heat generation member in the longitudinal direction;
• a first contact to which one end of the first heat generation member and one end of the second heat generation member are electrically connected;
• a second contact to which another end of the first heat generation member and another end of the second heat generation member, and one end of the third heat generation member are electrically connected;
• a third contact to which another end of the third heat generation member and one end of the fourth heat generation member are electrically connected;
• and
• a fourth contact to which another end of the fourth heat generation member is electrically connected.