Why Do I Get an Error for Not Providing an Argument and Another for if I Do?

In line 38 of my function, there is a utilization of CFrame that produces an error if I do not provide an argument, but when I provide one, it gives an error telling me I should not. Here is the function in question:

runService.RenderStepped:Connect(function()
    if detected == false and chatting == false then
        for i, npc in pairs (npcs:GetChildren()) do
            local humanoid = npc:FindFirstChild("Humanoid")
            local HMR = npc:FindFirstChild("HumanoidRootPart")      
            if humanoid and HMR then
                if(HMR.Position - characterHumanoidRoot.Position).Magnitude < 15 then
                    detected = true
                    detectedNPC = npc
                    promptLabel:TweenSize(UDim2.new(0,50,0,50),"In", "Linear")
                    print(detectedNPC.Name)
                end 
            end         
        end
    end
    if detected == true and chatting == false then
        local humanoid = detectedNPC:FindFirstChild("Humanoid")
        local HMR = detectedNPC:FindFirstChild("HumanoidRootPart")  
        if humanoid and HMR then
            if(HMR.Position - characterHumanoidRoot.Position).Magnitude > 15 then
                detected = false
                detectedNPC = nil
                promptLabel:TweenSize(UDim2.new(0,0,0,0),"Out", "Linear")
                print("no longer detected npc")
            else
                --world to screen point
                local WSTP = camera:WorldToScreenPoint(HMR.Position)
                promptLabel.Position = UDim2.new(0, WSTP.X, 0, WSTP.Y)
            end
        end
    end
    if chatting == true then
        local humanoid = detectedNPC:FindFirstChild("Humanoid")
        local HMR = detectedNPC:FindFirstChild("HumanoidRootPart")

        if humanoid and HMR then
            camera.CameraType = Enum.CameraType.Scriptable
            camera.CFrame = camera.CFrame:Lerp(HMR.CFrame * CFrame.new(-4,4,-7) * CFrame.fromOrientation(math.rad(-20), math.rad(215), 0) 0.07)
        end
    else 
        camera.CameraType = Enum.CameraType.Custom  
    end
end)

As shown, in line 38, when I write in the "0.07," I get the error: "Players.Khosraux.PlayerGui.NpcChatSystemGui.scriptNpcChat:153: Expected ')' (to close '(' at column 38), got '0.07'" however, when I comply and remove the 0.07 and run the game, I get the error: "Argument 3 missing or nil" which prints in my output box many times in rapid succession. There is a red underline whenever I type the 0.07 in as well. How do I rectify this? Thank you.