put lessons back for Michael

docs/lessons/speed-button/quiz-answers.md

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+# speed button quiz answers
+
+counter that keeps track of how many times button "A" has been pressed.
+
+This is the answer key for the [speed button quiz](/lessons/speed-button/quiz).
+
+## 1. What is a variable?
+
+<br/>
+
+A variable that is available throughout your main function.
+
+## 2. If the rectangle below represents the BBC micro:bit, shade the area that shows the value of the variable count.
+
+```blocks
+let count = 0
+```
+
+![](/static/mb/lessons/speed-button-0.png)
+
+## 3. If the rectangle below represents the BBC micro:bit, shade the areas that will be displayed after two button presses on Button A. Explain why that particular area is shaded.
+
+```blocks
+let count_ = 0
+input.onButtonPressed(Button.A, () => {
+    count_ = count_ + 1
+    basic.showNumber(count_, 100)
+})
+```
+
+<br/>
+
+![](/static/mb/lessons/speed-button-1.png)
+
+After two button presses, **count** will be equal to 2.
+
+## 5. If the rectangle below represents the BBC micro:bit, shade the areas that will be displayed after five button presses on Button A. Explain why that particular area is shaded.
+
+```blocks
+let count_ = 0
+input.onButtonPressed(Button.A, () => {
+    count_ = count_ + 1
+    basic.showNumber(count_, 100)
+})
+```
+
+![](/static/mb/lessons/speed-button-2.png)
+
+After five button presses, **count** will be equal to 5.
+