Question $1$ : $[9]$

$(1)$ Which set has random errors only $($A or B or C$)[1]?$

$(2)$ Which set has systematic errors only $($A or B or C$)[1]?$

$(3)$ Which set has random errors and systematic errors $($A or B or C$)[1]?$

$(4)$ Which reading causes Measurement errors $($A or $B)[2]?$

$(5)$ Uncertainty of the stopwatch is $.s[2].$

Uncertainty of the tape measure is cm $[2].$