Assume that the variable data refers to the dictionary {'b':20, 'a':35}. Write the expressions that perform the following tasks:  a. Replace the value at the key 'b' in data with that value's negation. b. Add the key/value pair 'c':40 to data. c. Remove the value at key 'b' in data, safely. d. Print the keys in data in alphabetical order.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Assume that the variable data refers to the dictionary {'b':20, 'a':35}. Write the expressions that perform the following tasks: 

a. Replace the value at the key 'b' in data with that value's negation.

b. Add the key/value pair 'c':40 to data.

c. Remove the value at key 'b' in data, safely.

d. Print the keys in data in alphabetical order.

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