Elastic scattering and breakup reactions of the proton drip-line nucleus <math> <mmultiscripts> <mi mathvariant='"normal"'>B</mi> <mprescripts></mprescripts> <none></none> <mn>8</mn> </mmultiscripts> </math> on <math> <mmultiscripts> <mi>Pb</mi> <mprescripts></mprescripts> <none></none> <mn>208</mn> </mmultiscripts></math>