Position is not a valid member,what?

So I found this script that has global functions in it and I decided to try it out in the output but I got an error saying:

Position is not a valid member

20:44:29.329 - Script 'Workspace.PartTweening', Line 2 - field TweenPosition

20:44:29.329 - Script '_G.TweenPosition(Workspace.Part.Position,Workspace.Part1.CF', Line 1

20:44:29.330 - Stack End

Script with global tables:

_G.TweenPosition = function(part, goal, t)
    local start = part.Position
    local increment = wait() / t
    local x, y, z = part.CFrame:toEulerAnglesXYZ()
    for i = increment, 1, increment do
        wait()
        part.CFrame = (CFrame.new(goal,i) + start:Lerp(goal, i)) * CFrame.Angles(x, y, z)
    end
    part.CFrame = (CFrame.new() + goal) * CFrame.Angles(x, y, z)
end

_G.TweenAngles = function(part, goal, t)
    local start = Vector3.new(part.CFrame:toEulerAnglesXYZ())
    local increment = wait() / t
    for i = increment, 1, increment do
        wait()
        local lerped = start:Lerp(goal, i)
        part.CFrame = CFrame.new(part.Position) * CFrame.Angles(lerped.X, lerped.Y, lerped.Z)
    end
end

_G.TweenPositionAndAngles = function(part, goalP, goalA, t)
    local startP = part.Position
    local startA = Vector3.new(part.CFrame:toEulerAnglesXYZ())
    local increment = wait() / t
    for i = increment, 1, increment do
        wait()
        local lerped = startA:Lerp(goalA, i)
        part.CFrame = (CFrame.new() + startP:Lerp(goalP, i)) * CFrame.Angles(lerped.X, lerped.Y, lerped.Z)
    end
    part.CFrame = (CFrame.new() + goalP) * CFrame.Angles(goalA.X, goalA.Y, goalA.Z)
end
--Blockoo

What I put in the output:

_G.TweenPosition(Workspace.Part.Position,Workspace.Part1.CFrame,1)

How would I fix this error in the script it out in the output?