HC 68

Heidelberg Catechism

Q68. How many sacraments has Christ instituted in the new covenant?

Two: holy baptism and the holy supper.

Matt. 28:19-20 — [19] Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, [20] teaching them to observe all that I have commanded you. And behold, I am with you always, to the end of the age.”
1 Cor. 11:23-26 — [23] For I received from the Lord what I also delivered to you, that the Lord Jesus on the night when he was betrayed took bread, [24] and when he had given thanks, he broke it, and said, “This is my body, which is for you. Do this in remembrance of me.” [25] In the same way also he took the cup, after supper, saying, “This cup is the new covenant in my blood. Do this, as often as you drink it, in remembrance of me.” [26] For as often as you eat this bread and drink the cup, you proclaim the Lord's death until he comes.

The Assembly cited Matt. 28:19-20 in support of this answer. Read it in context — how does it bear on what is claimed here?
2 passages are cited here. Which does the most work, and is anything claimed that the proofs do not obviously carry?
WSC Q88 treats the same ground. What does it add, and why might it put things differently?
WLC Q149 treats the same ground. What does it add, and why might it put things differently?