Create table named characters, the table have only two columns $($ch char$(1),$type

varchar$2(15)).$

b$.$ Fill in the table with the following data:

ch type

a

B

$5$

$7$

C

c$.$ Write a complete PL$/$SQL block to check the characters stored in the $$characters$$

table whether they are letters or digits, place the type of character in the "Type" field.

d$.$ Commit before the end of the block.

e$.$ Select from $$characters$$ table to verify that your PL$/$SQL worked.