leticia simplified an expression. her work is shown below. 4.5 divided by one-fourth 2 and one-half minus 0.75 times 8 step 1 18 2 and one-half minus 0.75 times 8 step 2 18 1.75 times 8 step 3 18 14 step 4 32 where did leticia make her first mistake? step 1 step 2 step 3 step 4