Questions refer to the Titanic data 1.Write a function that determines the number of missing entries for a specified column in the dataset.The function should return an`int`that corresponds to the...

DUMMY


Questions refer to the Titanic data 1.Write a function that determines the number of missing entries for a specified column in the dataset.The function should return an`int`that corresponds to the number of missing entries in the specified column. 2. Write a function that takes in as input a dataframe and a column name, and returns the `mean` for numerical columns and the `mode` for non-numerical columns. 3. Write a function that returns the survival probability of a passenger, given a condition on a **numerical variable** from the dataset. The condition will consist of a `column_name`, a `value` and a `boolean_operator`. Possible boolean operators include `"<"`,`">"`, or `"=="`. For example, `column_name = "Age"`, `boolean_operator = ">"`, and `value = 40` together form the condition `Age > 40`.