How to say if you could do it at all, i'd like you to do it. in Japanese
1)
せっかくせっかく(sekkaku) (n) stone burial chamber君君(kun) (pn) you/buddy/pal/monarch/ruler/sovereign/masterにに(ni) (prt) indicates such things as location of person or thing, location of short-term action, etc.それそれ(sore) (int)(n) there!/thatがが(ga) (prt) indicates sentence subject/indicates possessive/but/however/still/andやれるならno dictionary result, likely a conjigated verbno dictionary result, likely a conjigated verb、、(、) Japanese commaやってほしいんだno dictionary result, likely a conjigated verbno dictionary result, likely a conjigated verbがが(ga) (prt) indicates sentence subject/indicates possessive/but/however/still/and。。(。) Japanese period "."
