Answer:
(a) Next number is 8
(c) Next alphabet is M
Explanation:
Given


Solving (a): The next number
In the given sequence, each item is gotten by adding 2 to the previous item.
i.e.


So, the rule is: Add 2
Hence, the next number is:


Solving (c): The next letter
In the given sequence, each letter is gotten by skipping two alphabets i.e.
![D \to A []\ [] D](https://img.qammunity.org/2022/formulas/mathematics/high-school/qu6msx442hgprr6os8q3sp1mw976sy6vgk.png)
![G \to D []\ [] G](https://img.qammunity.org/2022/formulas/mathematics/high-school/q6u58a1dq120txjzfptnmonxurtf8cqpe8.png)
![J \to G []\ [] J](https://img.qammunity.org/2022/formulas/mathematics/high-school/fy6w99ysv2931eieo3ieo5b2zoo03ftw9l.png)
So, the rule is: skip 2 alphabets
![Next: J \ []\ [] M](https://img.qammunity.org/2022/formulas/mathematics/high-school/alt9rse15srze1ywpnv4pa84r6k9kba0r1.png)
The next letter is M
Solving (b); The next figure
This question requires an attachment.
Since, none is given; I will give a general explanation.
First, you need to study the pattern, identify the rule, then apply the rule
Take for instance, the attached image.
The pattern follows that:
1 layer, 3 dots
2 layers, 6 dots
3 layers, 9 dots
4 layers, 12 dots
This implies that,
Rule: Add 1 layer and 3 dots
So, the next will be:
5 layers, 15 dots