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#1 flex-5
#2 Which property cannot be used with negative values?

#3 flex-4
#4 Which of the following is an invalid property?
#5 The justify-self property apply to both flex items and grid items
#6 What is the default value of the flex-grow property?
#7 How to correctly place a grid item inside a named area?
#8 The align-self property apply to both flex items and grid items

#9 flex-1
#10 grid-area: 1/4; is equivalent to
grid-column-start: 4;
grid-row-end: 4;
grid-column-end: 4;
#11 How to make all the grid rows equal in height?
#12 How to define 3 columns in CSS grid?

#13 css-grid-2

#14 css-grid-4

#15 flex-2
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