Helen uses some toothpicks to form the pattern below.

\begin{array}{|c|c|} \hline \mbox{Pattern} & \mbox{Number of toothpick} \\ \hline 1 & 6\\ \hline 2 & 15\\ \hline 3 & 25\\ \hline 4 & 35\\ \hline 5 & \\ \hline \end{array}

(a) How many toothpicks will she need to form Pattern 5?

(b) How many toothpick will she need to form Pattern 40?

(c) Helen uses 4955 toothpicks to form a Pattern. Which Pattern is it?

(a) 45

(b) 40

(c) 496

(b) 40

(c) 496

(a) 47

(b) 43

(c) 498

(b) 43

(c) 498

(a) 49

(b) 45

(c) 500

(b) 45

(c) 500

(a) 50

(b) 49

(c) 502

(b) 49

(c) 502

None of the above