having trouble setting up this word problem

Question

sarah has a suare garden with sides of length m feet. if she decreases the length by 6 feet and increases the width by 5 feet.

1. find the area of the new garden
2. find the perimeter of the new garden

Answer 1

(1)

Initial area is

A₁ = m² ft²

New area is

A₂ = (m - 6)(m + 5) ft²

(2)

New perimeter is

P₂ = 2(L + W) = 2[(m - 6) + (m + 5)] = ?

SImplify and finish from here.

Answer 2

(m-6)(m+5)=m^2-m-30 sq/ft

2(m-6)+2(m+5)