Write a Python program that can find and perform string slicing to extract the portion of the string after the colon character and then use the float function to convert the extracted string into a floating$-$point number. $(10$ pts$)$

String is as follows:

str$\_$for$\_$q$01=\text{'}$X$-$DSPAM$-$Confidence:$0\mathrm{.}8475\text{'}$

$2.$ Write a Python program to split a given string using the delimiter as hyphens and display each resulting substring as a list. Use the string 'Emily$-$is$-$a$-$data$-$scientist$-$who$-$works$-$atgoogle$-$and$-$previously$-$facebook'. $(10$ pts$)$