plz answers these short Qs in python language

Q1-Assume that a list of integers named salary_steps that contains exactly five elements has been defined.

Write a statement that changes the value of the last element in the list to 160000.

Q2-Given a variable plist, that refers to a list with 34 elements, write an expression that refers to the last element of the list.

Q3-Given that a variable named plist has been defined and refers to a non-empty list, write a statement that associates its first element with 3.

Q4-Assume that salary_steps refers to a non-empty list, write a statement that assigns the value 30000 to the first element of this list.