help this is java

10/30/2017 math.pnw.edu/-rlkraft/cs12300/CS 12300_Exam_2_Review.java (c) Declare a variable of type int and assign to it the result of sending the object named r the nextInt message with parameter 10. (d) Create a String object containing the text "This is so much fun" and send the object the substring message with parameters that extract the first eleven letters of the string. Assign the result of this calculation to a variable called str which is declared to be of type String. (e) Send the object named str the concat message with parameter "easy". To the result of this calculation, send the toUpperCase message. (concat' is an abbreviation for concatenate, which means to put the string "easy" at the end of the string named by str.)