Can anyone do balance equation?

Abullet found at a crime scene may be used as evidence in a trial if the percentage of metals match to the composition of metals in a bullet from the suspect's ammunition. a forensic scientist's analysis of the bullet shows that it contains 11.9 g of lead, 0.5 g of tin, and 0.8 b of antimony. what is the percentage of lead metal in the bullet? express your answers to the one's place.

Ineed pls urgent 1-20 in order and fully detail step my step.

Mr. rose asked his student to draw a quadrilateral with four unequal sides. an example of this kind of quadrilateral