write a SQL query

Table Structure: flight COLUMN NAME DATA TYPE SIZE Constraint Fid Number 3 Primary key Fname Varchar 2 10 Splace Varchar 2 8 Dplace Varchar 2 8 Tdate date Seats Number 3 Note: Fid is Fight ID, Fname is Flight Name, Splace is a source place where the flight starts Dplace is destination place where the flight will reach, Tdate is tremel date of the flight and seats are the number of seats awilable in the flight Records inserted in to the flight table Fid Fname Splace Dplace Tdate Seats 101 Oman Air Muscat Delhi 20-Jan-2021 78 102 Air India Muscat Chennai 31-Dec-2020 null 201 Indigo Dubai Muscat 12-Feb-2021 93 103 Oman Air Chennai Dubai 23-Dec-2020 82 205 Air India Delhi Muscat 14-Feb-2021 115 202 Indigo Chennai Delhi 23-Jan-2021 null 2.Write an SQL query to display the flight Id, travel date and the number of seats available in the flight (if number of seats available value is 78, consider it as null and replace all the null values with 100) only for the flights whose travel date is before 22nd January 2021. [3 Marks] 3.Write an SQL query to display the biggest customer id, average value of ticket amount and standard deviation of number of tickets booked rounded with 3 decimal places for the customers whose name starts with the letter "M" or ends with the letter "d". [4 Marks]