How to split this arrays?

Hello! Everybody~ Here is Example for my question!

 a = [0 0 1 0 0 0 0 1 0 0 0 0 0 0 1];

Like the image above, I wanna split this array for including another values.

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b = [0 0 1];
c = [0 0 0 0 1];
d = [0 0 0 0 0 0 1];

I've been asking similar things before, so I'll link. Please help me~~~ https://kr.mathworks.com/matlabcentral/answers/362091-how-to-split-command-signal-arrays-in-command-order-sequence#comment_495037