You write the following class defintion:

class custom:

def $\_($self$)$:

self. value $=45$

def $\_$update$($self$,$ new$\_$val$)$:

self. value $=$ new$\_$val

You make an instance of the class and try to call the update method but it doesn't work:

test $=$ Custon $()$

test. update $(75)$

Which statement below best describes why your main program $($the two lines above$)$ fails?

We have to assign new$\_$val to self.new$\_$val in order for this to work, i$.$e:

self.new$\_$val $=$ new$\_$val

You cannot change the value of a variable defined in the constructor

The user does not have access to the update method

When we created the object, we didn't pass anything in to the constructor