Educational worksheet for practicing writing uppercase and lowercase letters.

Problem Analysis:

The task involves two parts:
1. Part A: Write the uppercase (big) letters corresponding to the given lowercase letters.
2. Part B: Write the lowercase (small) letters corresponding to the given uppercase letters.

Solution:

#### Part A: Write the uppercase letters
We are given lowercase letters and need to write their corresponding uppercase forms.

| Lowercase | Uppercase |
|-----------|-----------|
| c | C |
| o | O |
| b | B |
| n | N |
| l | L |
| y | Y |
| t | T |
| h | H |
| i | I |
| f | F |
| d | D |
| j | J |
| e | E |
| r | R |
| q | Q |
| m | M |
| a | A |
| p | P |
| g | G |
| u | U |

So, the completed table for Part A is:

| c | y | d | m |
|---|---|---|---|
| O | T | J | A |
| B | H | E | P |
| N | I | R | G |
| L | F | Q | U |

#### Part B: Write the lowercase letters
We are given uppercase letters and need to write their corresponding lowercase forms.

| Uppercase | Lowercase |
|-----------|-----------|
| G | g |
| A | a |
| I | i |
| O | o |
| P | p |
| M | m |
| R | r |
| U | u |
| C | c |
| D | d |
| T | t |
| E | e |
| J | j |
| N | n |
| H | h |
| Q | q |
| B | b |
| L | l |
| F | f |
| Y | y |

So, the completed table for Part B is:

| G | M | E | B |
|---|---|---|---|
| A | R | J | L |
| I | U | N | F |
| O | C | H | Q |
| P | D | T | Y |

Final Answer:

Part A:
| C | Y | D | M |
|---|---|---|---|
| O | T | J | A |
| B | H | E | P |
| N | I | R | G |
| L | F | Q | U |

Part B:
| g | m | e | b |
|---|---|---|---|
| a | r | j | l |
| i | u | n | f |
| o | c | h | q |
| p | d | t | y |

$$
\boxed{
\text{Part A:}
\begin{array}{|c|c|c|c|}
\hline
C & Y & D & M \\
\hline
O & T & J & A \\
\hline
B & H & E & P \\
\hline
N & I & R & G \\
\hline
L & F & Q & U \\
\hline
\end{array}
\quad
\text{Part B:}
\begin{array}{|c|c|c|c|}
\hline
g & m & e & b \\
\hline
a & r & j & l \\
\hline
i & u & n & f \\
\hline
o & c & h & q \\
\hline
p & d & t & y \\
\hline
\end{array}
}
$$