25 point !
consider the following expression.

the expression is evaluated below, but a mistake is made in the calculation somewhere. identify the mistake and then evaluate the expression correctly. complete the statements below.

the mistake occurs in step (1,2,3,4, or 5)
because the student evaluated
a. (-11.7 + 0.5)
b. (27.4 - 32.2)
c.(1 - (-1))
d. (2.2 + (-11.2))
- (-4.8))
f. -4.2

the correct solution is
a. -4.1
b. -2.2
c. -6.2
d. -4.4
e -2