Weakly bound halo breakup of neutron- <math> <mmultiscripts> <mi>Li</mi> <mprescripts></mprescripts> <none></none> <mn>7</mn> </mmultiscripts> </math> and nucleon- <math> <mmultiscripts> <mi>Be</mi> <mprescripts></mprescripts> <none></none> <mn>7</mn> </mmultiscripts> </math> on a lead target